The U.S. plans to deploy some 3,000 troops to Afghanistan this spring in order to fight against the Taliban insurgency, according to a Pentagon spokesman.

On Wednesday the Pentagon announced that Defense Secretary Robert Gates thought of sending 3,000 Marines to Afghanistan, thus increasing the number of the American servicemen and women to 30,000, Reuters reports.

The Marines will be in place by April and will stay in the country for about seven months to decrease violence.

Attacks increased 27 percent and 60 percent were in the southern province of Helmand, where the presence of the rebels is strongest.

Zahir Azimi, a spokesman for Afghanistan's Defense Ministry, said that the new troops will help in the operations against the rebels just as the new national army is growing.

He said: "As we are in the fight together with the international community, the deployment of additional troops to Afghanistan is considered necessary in the current situation. (But) The Afghan National Army is the answer for the long-term security in Afghanistan to thwart internal and external threat to the country and to maintain the force balance."

On Friday Gates will receive a formal order to send a Marine air-ground task force and a Marine battalion to Afghanistan, according to Washington Post.

The U.S has been trying for months to convince NATO allies to send combat troops in Afghanistan in order to train the local forces and for security.

Geoff Morrell, Pentagon press secretary, said: "Our allies are not in a position to provide them (extra troops) so we are now looking at perhaps carrying a bit of that additional load.”

According to Morrell, the Marines will be sent mostly in the southern part of the country, where British, Canadian and Dutch troops have carried many of the fighting.

The NATO command in Afghanistan is now lead by Britain.

The Marines deployed in Afghanistan will train the Afghan army and police.

Afghan army needs more trainers as Pentagon has decided last month to increase the power from 70,000 to 80,000.