Srinagar, Feb 9 (IANS): At least eight people were injured, two seriously, as violence erupted in the Kashmir Valley Saturday against Afzal Guru's hanging.

A group of protesters started marching in north Kashmir's Doabgah village near Sopore town, the ancestral village of Afzal Guru, after they got news of his hanging.

Police sources said the protesters defied the curfew and attacked security forces with stones.

The security forces used batons and tear gas to quell the protests. Warning shots were fired in the air.

In another incident, three protesters sustained injuries in Baramullah in clashes with security forces.

Doctors in a Baramullah hospital told the media that two cases were referred to Srinagar.

The Hurriyat has called for four days of mourning.

It called the hanging a "political killing which has nothing to do with the legal system of India".

"Afzal's hanging has more to do with forthcoming elections than any legal process which he faced," its statement said.