At least three people were killed when a Taliban suicide bomber attacked an Afghan army bus in Kabul on Thursday, the interior ministry said.

Local media said at least seven others were injured in the attack.

The bombing is the fourth such Taliban attack since the swearing in of new President Ashraf Ghani on Monday.

At least seven Afghan soldiers died and many were injured after a suicide bomber targeted another army bus in Kabul on Wednesday.

The Taliban claimed responsibility for all four attacks, saying they were a continuation of an offensive which started in the summer.

The day after being sworn in, Mr Ghani signed a deal letting US troops stay in Afghanistan after the end of 2014.

Mr Ghani's predecessor, Hamid Karzai, had refused to sign the deal because of a disagreement with the US.

The Taliban has vowed to fight President Ghani's new government, which it called a "US-orchestrated sham".

Under a US-brokered unity deal Mr Ghani shares power with runner-up Abdullah Abdullah who becomes chief executive.

(BBC)