Rioters in the southern Jordanian city of Maan set fire to government buildings, police cars and businesses on Tuesday to protest the murder of two men earlier this week prompting the government to send security forces to restore order.

Witnesses say more than 500 rioters were protesting the lack of arrests after Monday’s killings. Demonstrations filled streets in the desert town about 250 kilometers south of the capital, Amman.

Security officials said on Tuesday that they used tear gas to disperse protesters who had attacked government property and damaged private shops. Interior Minister Saad Hayel Srour told state television that the government would not tolerate vandalism. He also said those who had killed the two Maan residents had been identified.

Residents say the unrest followed the funeral of two workers from prominent Maan tribes who had been killed in a labor dispute by Bedouins from the powerful Hwaitat tribe.

They said Hwaitat members were angered that rival tribes from Maan were employed in their hometown to build a multi-million dollar water project.