A burka clad female suicide bomber blew herself up at a check post in northwest Pakistan Tuesday, in the country's first such attack involving a woman, police said.
There were no other casualties in the blast in the northwestern Pakistani city of Peshawar, which is near the tribal belt bordering Afghanistan where troops are battling Islamic militants, they said.
It happened in a high-security zone where intelligence services buildings and a Christian convent school are located, provincial police chief Mohammad Sharif told AFP.
"This is the first suicide attack carried out by a woman in Pakistan. She was the single casualty," Sharif said.
"She came to the army check post, she was stopped but she blew herself up. No soldiers were injured in the blast," a police official said
A security official at the scene said that the woman was thought to be an Afghan refugee aged about 40.
Police earlier said the bombing was outside St Mary's convent school, one of Peshawar's top schools, and that it had killed one person.
There was no immediate claim of responsibility.
President Pervez Musharraf imposed a state of emergency in Pakistan on November 3, citing the need to curb a wave of Islamic militant violence in the northwest of the country.
Pakistani officials have previously said that militancy is thriving in giant refugee camps in the northwest and southwest where more than two million displaced Afghans are registered.