More people in Pakistan are joining protests against a CIA contractor charged with the murder of two Pakistanis in the eastern city of Lahore in January.
University students, human rights and political activists as well as lawyers have called for punishing Raymond Davis.
On Monday, a fresh protest was held against US efforts to secure Davis’ release without punishment.
Washington says Davis has diplomatic immunity and has stepped up pressure on Islamabad to free him.
People across Pakistan have repeatedly taken to the streets to push for his prosecution.
Police have rejected Davis’ claims that he killed the two Pakistanis in self-defense and say the American national had even checked to make sure that his victims had been killed.
Reports say the CIA is mulling over the targeting of Pakistani diplomats and intelligence agents across the world in an effort to pressure Islamabad to release Davis.
Hundreds of people also staged an anti-American rally outside the US Consulate in Lahore on Sunday. Protesters demanded the capital punishment for Davis.