MAZAR-I-SHARIF, Afghanistan (Reuters) -- A suicide bomber killed three German soldiers and four civilians on Saturday in the northern Afghan province of Kunduz, Afghan security officials said.
To the south, militants in Kapisa province engaged Afghan and foreign forces overnight in a battle in which several dozen Taliban fighters were believed to have been killed, the U.S.-led coalition said.
And in the Shinwar district near Jalalabad, a remote-controlled bomb killed a police chief and another officer and wounded three others on Saturday, a local official said.
Insurgents have stepped up attacks in Afghanistan in recent weeks following the traditional winter lull. The Taliban has said it has trained hundreds of suicide bombers to carry out the attacks.
In the city of Kunduz, the suicide bomber struck when the German soldiers were patrolling on foot and in a vehicle.
"Suddenly we heard a big sound. We were frightened," said Aziz, a shopkeeper. "We saw very thick smoke and people rushing to escape."
In addition to the seven killed in the blast, 14 people, including two German soldiers, were wounded, according to local security officials who blamed the attack on the Taliban.
On Thursday, roadside explosions killed 11 Afghan police officers and the nation's information minister was wounded in a suicide bombing.
The attacks follow the death of the insurgents' top operational commander, Mullah Dadullah, in a U.S.-led coalition raid last weekend. His death was considered the biggest blow to the Taliban since they were driven from power in 2001.
In Kapisa province, northeast of Kabul, militants ambushed and tried to trap Afghan and coalition forces before midnight Friday in the al-Asay valley, a coalition spokesman said.
"Coalition air strikes were called in. Several dozen enemy fighters were believed to have been killed," Major Chris Belcher, a coalition spokesman, said.