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The failed car bomb attack on New York may give Pakistan a bad name, Interior Minister Rehman Malik says, because the man charged is of Pakistani origin.But Mr Malik said the fact the incident took place in the US and that Faisal Shahzad was a naturalised US citizen made him the responsibility of the US.
Mr Shahzad has admitted trying to detonate the bomb having learnt how to make it in Pakistan, court papers say.
He was caught on Monday at JFK Airport after boarding a plane for Dubai.
Explosives charges
Questions have been asked as to why the 30-year-old was allowed on to a Dubai-bound plane despite being on a no-fly list.
It was only when customs agents checked passenger names 30 minutes before take-off that his name was noticed and he was arrested.
Mr Shahzad faces terrorism and explosives charges.
These include attempting to use a weapon of mass destruction and transporting an explosive device with the intent to kill.
Mr Shahzad has reportedly told US investigators that he learned his bomb-making skills in the Pakistani tribal region of Waziristan. Mr Malik told the BBC that his country was not embarrassed by the revelation as the incident was part of an insurgent campaign against Pakistan.
"This unfortunate incident, having been done under the name (of Pakistan) or by a Pakistani will definitely bring a bad name to Pakistan, for which we are worried," he said.
"But at the same time one has to see the efforts which (the) Pakistan government is putting in it... And of course the determination and resolve of the government of Pakistan to fight back against these terrorists."
He said that even if Mr Shahzad had received terrorism training in Pakistan, that did not change Islamabad's efforts to tackle the problem of Pakistan-based militants.
"The guy goes there for a studentship. He gets naturalised. He gets married, living with his wife. So it has happened in the US. So of course primarily it is the duty of that particular authority to keep an eye (on him).
"If the individual decides to take the training individually and then gets motivated or does an act on his own, you cannot level that as a collective thing from Pakistan, or say that any sort of help is being given to them," he said.
Smoking car
Mr Shahzad was not in court to hear the charges against him on Tuesday.
He is alleged to have bought a car that was found loaded with a bomb made from fertiliser, fireworks, petrol and propane gas tanks.
The 1993 Nissan Pathfinder was left with its engine running and hazard lights flashing in Times Square on Saturday evening - when the square was packed with tourists and theatregoers.
The bomb was discovered and dismantled after a street-vendor noticed smoke coming from the vehicle and alerted police.
The unexploded bomb left crucial evidence intact that detectives used to trace Mr Shahzad.
Despite his name being added to the government's no-fly list on Monday, Mr Shahzad managed to buy a ticket on an Emirates flight to Dubai and made it through JFK's security checks late that evening.
After last-minute checks by customs agents, the flight was stopped as it taxied to the runway.
The United Arab Emirates (UAE) government said Mr Shahzad had been heading for Islamabad in Pakistan, and had been due to change planes in Dubai.
Investigators said the Connecticut resident implicated himself and told them he was acting alone.
But court documents stated that he admitted having attended a militant training camp in the Pakistani tribal region of Waziristan.
He apparently told investigators the plot had begun in December last year.
How Times Square bomb suspect was arrested
The trail which led to the arrest of Times Square bomb suspect beganwith the discovery of a suspicious car early on Saturday evening, 1 May, close to New York's busy Times Square. 
The Nissan Pathfinder was caught on cctv cameras arriving in TimesSquare just before 1830 EDT. A street seller raised the alarm when he noticed the car parked with its engine running and hazard lights flashing.
Police evacuated Times Square. In the car's boot they found all the ingredients for a homemade bomb including propane gas cylinders, fireworks and two clocks, a metal gun locker containing fertiliser. 
From the car's vehicle identification number, police traced the woman inConnecticut who sold the car to Faisal Shahzad (pictured). She also gave police a mobile phone number and helped identify him from photographs. 
Faisal Shahzad lived in this Bridgeport building. Mobile phone records showed he made several calls to Pakistan and to a fireworks store in Pennsylvania. Court documents said he had received bomb-making training in Pakistan. 
Police removed fireworks and fertiliser from the Bridgeport home. Mr Shahzad was arrested on Monday 3 May after boarding a flight to Islamabad, Pakistan. Although his name was on a no-fly list, he was allowed onto the plane.This article is from the BBC News website. ? British Broadcasting Corporation, The BBC is not responsible for the content of external internet sites.