The officials said three attackers were killed in ensuing clashes. A medical official said five troops, including officers, were wounded.

“We have compelling evidence that this terrorist act was committed with the help of the Russian Federation,” Vitaly Nada said.

Two people aboard the Polish bus and all seven people in the minibus were killed. At least six of the dead were Polish citizens.

"Obstinately low inflation can seriously undermine growth," Christine Lagarde warned in a speech in Paris.

The fighting has been among the deadliest between government forces and the Islamic State group since the start of the uprising.

"An independent investigation must be carried out. For that, a ceasefire is required," the German chancellor said.

Hostilities escalated after the abduction and killing last month of three Jewish seminary students that Israel blames on Hamas.

The NKR army continued with their military duty in line with ceasefire principles, taking measures to protect the frontline.

The attack took place in the Shiite neighborhood of Abu Dashir, and that another 16 people were wounded in the blast.

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