Lahore, Apr. 8 : A series of attacks in Pakistan claimed by Baitullah Mehsud-led Taliban indicates that there is a power struggle is going on among militant groups, say experts.

"There is an internal power struggle going on now. When Mehsud thinks that someone new is coming up and could overshadow him, he kills him," a former Inter-Services Intelligence (ISI) station chief told the Daily Times.

Mehsud gained attention by sending suicide bombers to attack US and NATO forces stationed in Afghanistan.

In 2007, he formed Tehreek-e-Taliban and declared war on Pakistan for supporting the US in Afghanistan.

In the recent terror attacks in Lahore, a former Mehsud lieutenant from another tribe first claimed responsibility for the attack.

Subsequently, Mehsud quickly called up local reporters to take `ownership'.

According to a Taliban leader, the two commanders often argue.

"The Lahore attack could have been his [Mehsud's] idea, but he could not have done it without some help from the Punjabis," an ISI source claimed.

"With the Pakistani Taliban and Al Qaeda, Mehsud has become very powerful among the tribal militants, but he may be feeling the heat from the Punjabis. They are better trained and perhaps even more motivated than his men. While there is increasing coordination among the groups, all of them may not want to take orders from him," he added. (ANI)