Drone activity in Pakistan moves northward, official says

Intense drone activity in Pakistan's tribal region has moved northward, mirroring the movement of suspected militants as they try to flee the targeted strikes, according to a senior Pakistani military official.

Officials have seen an increased militant presence in Khyber Agency, one of the seven districts of Pakistan's tribal region bordering Afghanistan, said the official, who did not want to be named due to the sensitivity of the operation.

Specifically, he says "they are moving into the Tirah Valley."

Three suspected U.S. drone strikes Friday were all concentrated in the Tirah Valley, two Pakistani intelligence officials said.

The strikes, which targeted suspected militant hideouts and a training camp, killed 57 people - a record for a single day. Officials say all three hit within 4 square kilometers of each other