Orlando shooter Omar Mateen
Orlando shooter Omar MateenPublic Domain

Omar Mateen, the terrorist who killed 49 people at a gay nightclub in Orlando, has been buried at a Muslim cemetery in southern Florida, Reuters reported on Thursday.

A state death certificate lists Mateen's burial site as the Muslim Cemetery of South Florida in Hialeah Gardens, a city in Miami-Dade County, according to the Orlando Sentinel newspaper.

Mateen, 29, was killed after taking hostages during a three-hour standoff inside the Pulse nightclub by police who ended his attack.

A funeral home located at the same address as the cemetery carried out the arrangements, the state document showed. It did not give Mateen's cause of death. The cemetery could not immediately be reached for comment, according to Reuters.

Mateen, a U.S. citizen born in New York to Afghan immigrant parents, pledged allegiance to the Islamic State (ISIS) jihadist group during a phone call with authorities during his rampage.

It has also been revealed that he took to social media during the massacre to declare support for ISIS, writing, among other things, “You kill innocent women and children by doing us airstrikes… now taste the Islamic State vengeance.”

U.S. authorities have said the attack was both terrorism and a hate crime.