BEIRUT: Slain security official Brig. Gen. Wissam al-Hasan will be buried Sunday next to the tomb of former Prime Minister Rafik Hariri in Downtown Beirut, Future Movement sources told The Daily Star over the weekend.

The sources said the Future Movement was calling on all its supporters to gather Sunday at Martyrs' Square to take part in Hasan’s funeral.

Hasan, who headed the police’s Information Branch, was assassinated in a car bomb blast Friday that ripped through the crowded neighborhood of Ashrafieh.

The 47-year-old was known for his pivotal role in major security investigations in the country.

He was also the head of the security apparatus responsible for Rafik Hariri’s safety.

Hariri, a five-time Lebanese prime minister who was assassinated by a massive car bomb in 2005, is buried beside the Mohammad al-Amin Mosque in Martyrs' Square, Downtown Beirut.

Hasan’s funeral will be attended by Future Movement officials, including its general secretary Ahmad Hariri, the sources said.

Former Prime Minister Saad Hariri, the son of Rafik Hariri and the head of the Future Movement, described Hasan Friday as a close friend to his family.