A Nepali security guard working at a residential complex was among six people killed in a suicide blast in Afghan capital Kabul Wednesday morning.

A suicide car bomb targeted the entrance gate of the compound named Green Village which locates in Pul-i-Charkhi area at about 6:15 a.m. local time enabling other armed militants to enter the complex, Xinhua news agency said quoting a police officer. Six people were killed and 17 others injured in the incident. There residential complex is used by  several foreigners working in different international organisations.

"There are some gunmen inside the complex and still are fighting with security forces," Xinhua quoted the police official Several foreign staff were caught up inside the building and it was not clear immediately whether any foreign people may have been killed in the incident.

The identity of the Nepali national killed in the blast was not immediately verified.

The attacks came hours after U.S. President Barack Obama left Kabul following a surprise visit, during which he signed the strategic partnership agreement with his Afghan counterpart Hamid Karzai.

The Pul-i-Charkhi area where the attack occurred located in Jalalabad road, the main way out of the capital to the east till the border with Pakistan. Several U.S. and NATO military camps are located nearby. Taliban militants have claimed the responsibility for the attack, the report said.

According to Xinhua, its reporter near the site said that sporadic firing still could be heard in the area.

The area was cordoned off by security forces and police were on high alert across the Kabul while several helicopters were hovering above the area to monitor the situation. nepalnews.com