A series of explosions hit the Afghan capital Saturday, killing at least four people including two police officers and wounding another four.

Police and a public health official say the deaths were caused by a sticky bomb attached to a police vehicle detonated in western Kabul.

Two other police were wounded when a bomb attached to their car exploded earlier in southern Kabul.

A third sticky bomb detonated in eastern Kabul but caused no casualties.

There are reports of at least two other blasts elsewhere in the city but police have no immediate details.

The latest attacks come as Taliban and Afghan government negotiators hold talks in Qatar, trying to hammer out a peace deal that could put an end to decades of war.