Kabul, May 1 (IANS) A 12-year-old suicide bomber blew himself up at a crowded market in eastern Afghanistan, killing four people, a day after the Taliban announced an offensive, BBC reported.

Many people were injured when the boy struck at the market in Paktika province. A local official, a woman and two men died.

The suicide bomber was a 12-year-old boy, said a statement from the governor’s office.

In Ghazni city, a man opened fire at a police checkpoint, killing two policemen and two civilians.

A bicycle bomb blast near the city’s main police station injured 13 people.

On Saturday, the Taliban declared a new attack on foreign troops, Afghan security forces and government officials.

International organisations, including the UN, have warned their staff not to go out unless absolutely necessary.