Militants today stormed into the offices of a US-based NGO in Mansehra area of northwest Pakistan, killing six persons, including two women, and wounding six others.

Lobbing grenades and firing from their automatic weapons, the militants struck the premises the NGO World Vision in Oghi sub-division of Manshera district early this morning and shot on spot six employees, police said.

Two women were among the six injured persons, who were taken to a hospital in Oghi. Police said eight to 10 militants carried out the attack.

Law enforcement agencies sealed off the area and launched a search for the militants.

North West Frontier Province chief minister Ameer Haider Khan Hoti condemned the incident and expressed sympathy over the loss of human lives.

He said the government would compensate the affected families and reiterated his resolve to continue the fight against terrorism till the last militant is eliminated.