America's Central Intelligence Agency chief Leon Panetta has said the drone attacks against the Al Qaeda [Images] and the Taliban [Images] targets inside Pakistan would continue.

"Nothing has changed our efforts to go after the terrorists, and nothing will change those efforts," Panetta was quoted as saying by The Washington Post.

The drone attacks, against which there has been public backlash inside Pakistan, have been highly successful, the CIA chief said.

"It is for that reason that President Barack Obama [Images] and Vice President Joe Biden and everyone else supports continuing that effort," he was quoted as saying by The New York Times.

Panetta, however, refrained from giving any details about the drone attacks. "I don't think we can stop just at the effort to try to disrupt them. I think it has to be a continuing effort, because they aren't going to stop," Panetta was quoted as saying by The Washington Post.

Meanwhile, in a series of interviews, the visiting Pakistani Foreign Minister Shah Mahmood Qureshi opposed the drone attacks and said he would take this up during his meetings with American leaders.

The drone strikes and raids are proving effective, having killed as many as 80 Al Qaeda fighters in the past year, the New York Times quoted unidentified Pakistani intelligence officials as saying.

Pakistani officials, the daily said, suggested that the Al Qaeda is replenishing killed fighters and midlevel leaders with less experienced but hard-core militants, who are considered more dangerous.