At least 13 people were injured in the twin blasts in Jama Masjid, India's largest mosque in Old Delhi, Friday afternoon, said the police.

The blasts caused no death and two injured were in serious conditions, a policeman told Xinhua.

The first explosion took place at around 5:15 PM (1245 GMT) Friday when devotees were preparing for the evening prayer near a pond used by them for ablution inside the mosque. Fifteen minutes later another blast rocked the place, eyewitnesses said.

The police said the bombs were of low intensity.

According to NDTV reports, intelligence agencies have ruled out the possibility that the blasts were an act of terror, instead they are being called an act of mischief.

Blood and blasts remains were seen along the side of the pond in the center of the mosque yard, but the blasts did not damage the floor and buildings of the mosque built around 400 years ago.

Top police officials immediately rushed to the spot and the entire area was cordoned off. Those injured were shifted to nearby hospitals.

Eyewitnesses said the explosives were suspected to have been kept in plastic bags.

Immediately after the blasts, policemen in full strength were deployed in the communally sensitive and crowded area to guarantee order.

Indian Prime Minister Manmohan Singh condemned the blasts and called for peace.

The Imam of the Jama Masjid also appealed to the people to maintain calm.

The police told Xinhua that bombs had been found unexploded in the mosque half a year ago.

Red alert has been raised in Lucknow and Varanasi of neighboring Uttar Pradesh, Kanpur, Mumbai and Madhya Pradesh.

Hours ago, five people were killed and 15 others wounded in a series of powerful hand grenade explosions in India-controlled Kashmir's summer capital Srinagar.

(Xinhua News Agency April 15, 2006)