A university student in Pakistan accused of blasphemy against Islam has been killed by a mob of fellow students on campus, police say.
Many students have been arrested after the brutal attack in the northern city of Mardan, and the campus has been closed.
Reports suggest that two young men were accused of posting offensive content on Facebook. One survived with injuries.
Blasphemy is a highly sensitive and incendiary issue in Pakistan and critics say the strict blasphemy laws, which allow the death penalty in some cases, are often misused to oppress minorities.
There have been other cases where people accused of it have been killed by an angry crowd.
The murdered student has been identified as Mashal Khan, who studied journalism. Some reports say he was shot, while others say he was beaten to death with planks.
"He was badly tortured after being shot at close range... He was beaten with sticks, bricks and hands," senior police official Niaz Saeed told the AFP news agency.
Hundreds of people were involved, the officer said. Graphic video footage of the incident has emerged online.
Police had not been investigating the two accused men, nor had any case been filed against them, and the mob appeared to have acted on rumours, the Dawn newspaper reports.