New Delhi, Oct. 14 -- A clash between Pakistan authorities and thousands of protesters marching in support of Palestinians killed at least five people including a police officer and injured dozens of other officers on Monday, police and witnesses said.

Punjab Police Chief Usman Anwar said demonstrators opened fire on authorities, killing the officer and wounding others. Police said three protesters and one passerby also died in the clashes before the demonstrators were dispersed.

The march was organized by political party Tehreek-e-Labbaik Pakistan, or TLP, which said in a statement that hundreds of rally participants were injured and the casualty figure was high among its supporters.

Videos released by TLP on Monday showed several veh...