At least 11 people, including nine police officers, have been killed in a suicide bombing in southern Afghanistan, according to police officials.
The attack, which wounded another 24 people, targeted the main police building in Lashkar Gah, the capital of Helmand province.
Asadullah Sherzad, the provincial police chief, said the bomber had been wearing a police uniform and detonated his explosives inside the building.
Sherzad says the policemen were exercising in the yard at the time of the attack.
In a separate attack in Farah, a province in western Afghanistan, a would-be suicide bomber armed with a grenade killed a police officer guarding a compound, an Afghan official said.
The bomber was shot dead by other police as he tried to enter the compound and blow himself up, the official said.
The attacks come a day after a string of bombings killed at least seven people, including four Nato soldiers, in the south and east of Afghanistan.
Nato vehicles targeted
Across the border, suspected pro-Taliban fighters set ablaze on Monday vehicles bound for US-led forces stationed in Afghanistan, according to Pakistan police.
The incident was the second such attack in two days.
In the latest assault, fighters entered a supply depot on the outskirts of the northwestern city of Peshawar at around 1am local time (20:00 GMT on Sunday), overpowered guards and set fire to vehicles, police said.
"About 50 gunmen attacked us ... They first disarmed us and then began setting fire to bulldozers and Humvees," Raza Khan, one of the depot's guards, was quoted by the Reuters news agency as saying.
"A police team arrived after about an hour and an exchange of fire took place for an hour."
Sixteen bulldozers and Humvee patrol vehicles were destroyed, Khan said.
Pro-fighters stepped up attacks on the road through northwest Pakistan into Afghanistan last year, exposing the vulnerability of Western supply links just as the US was planning a surge of troops to tackle the Taliban.
PHOTO CAPTION
File photo shows a British soldier talking to Afghan policemen on the outskirts of Lashkar Gah in Afghanistan's Helmand province.
Al-Jazeera