JALALABAD/KABUL (REUTERS) - At least three bombs exploded outside a jail compound in the eastern Afghan city of Jalalabad on Sunday (Aug 2), officials said as they rushed police forces to the scene.

Mr Sohrab Qaderi, a provincial council member in Jalalabad, said a huge car bomb explosion was followed by at least two smaller bomb blasts outside a government-run prison.

He said attackers had taken up position near the prison and heavy clashes between the militants and Afghan police were underway.

"At least 20 people were injured in the ongoing clashes," Mr Qaderi said.

No militant group has taken responsibility for the attack.