KABUL: A suicide bomber targeted a Nato convoy in Kabul on Monday, killing one civilian, while another struck an Afghan army patrol in the eastern Nangarhar province, killing two civilians, Afghan officials said.

Deputy Interior Minister Gen. Ayub Salangi confirmed the attack in the capital, saying one civilian was killed and three others were wounded.

Nato said one of its vehicles was attacked in Kabul, adding that there were no immediate reports of any casualties among members of the military coalition.

Taliban insurgents claimed responsibility for the attack in an emailed statement.

In a separate incident, two Afghan civilians were killed and six others were wounded when a suicide bomber targeted an Afghan army patrol in the Nangarhar province, the Afghan Interior Ministry said in a statement.

The Defence Ministry said in a statement that an Afghan army officer was wounded and two army vehicles were damaged in the bombing.

No group immediately claimed responsibility for the attack.

Taliban insurgents have stepped up attacks against Afghan security forces in a bid to undermine the Western-backed government as foreign combat troops prepare to withdraw from Afghanistan by the end of the year.