SRINAGAR: Militants opened fire on a military convoy in Kashmir Monday, killing four soldiers and wounding six others in an attack on the eve of a visit by Prime Minister Manmohan Singh, the Indian army said.

The soldiers were attacked on the outskirts of Srinagar, the main city in Indian-administered Kashmir, army spokesman Colonel Brijesh Pandey said.

“We have received 10 casualties from the attack site at the military hospital, four of them were fatal,” he said, adding that one of the six wounded is in a critical condition.

The attack came amid a high state of alert which had been imposed ahead of Singh’s arrival on Tuesday for a two-day visit to the territory, his first since June 2010.

Security officials had earlier said that police and paramilitary forces were being deployed in strength across the region and additional check points had been erected along major highways.

“A high alert is there. We do face a threat from the militants,” police chief Abdul Gani Mir said.

Kashmir, a picturesque Himalayan territory, is divided between India and Pakistan by a UN monitored de facto border known as the Line of Control (LOC) but it is claimed in full by both.

Security concerns were further raised on Saturday when armed rebels struck in a busy commercial area in the heart of Srinagar, killing two policemen in a shoot-and-run incident.

The three main separatist groups opposed to Indian rule have called for a total shutdown for Tuesday to protest the prime minister's visit.

“This is a protest against the forcible military occupation of Kashmir and we want to give the Indian prime minister this message that by hanging Afzal Guru, New Delhi has sent the entire Kashmiri people to the cross,” Syed Ali Geelani, a top Kashmiri leader said in statement.

Mohammad Afzal Guru, a Kashmiri Muslim, was secretly executed and buried inside a high security prison in New Delhi in February for his role in a deadly attack on India’s parliament in 2001.

Four people were killed during a security crackdown against widespread protests over the hanging of Guru, whom many people in Kashmir believe was framed.

Singh, who will be accompanied on his visit by the president of the ruling Congress party Sonia Gandhi, is scheduled to inaugurate a section of an ambitious railway project that is expected to link the land-locked Kashmir valley to the massive Indian rail network by 2018.