A bomb in a market in the north-western Pakistani city of Peshawar has killed at least one person and injured many others, police say.
Police say the device was attached to a motorcycle. It is not clear who might have been behind the blast.
The city's police chief Habibur Rehman told AFP the device was a "time-bomb".
The blast came shortly after the US shut its consulate in the city following what officials said was a "specific and credible threat".
The mission in the North West Frontier Province capital was closed "until further notice", a spokeswoman said.
The dead man was a policeman, while 16 other people were injured in the blast, Mr Rehman said.
"It was a time-bomb which exploded when the market was full of customers," he said.
The city was in a state of high alert following the closure of the US consulate and there was tight security around the consulate and government buildings, he said.
"There is a possibility that the terrorists wanted to strike at a different place but because of the tight security they detonated the device in the bazaar[market]."
Earlier reacting to the closure of the US mission the NWFP government told Reuters news agency the move was a "drastic step".
US missions in Pakistan have shut for security reasons a number of times. In 2002, a car bomb outside the US consulate in Karachi killed 12 people.