The FBI is offering a $50,000 reward for information after a man was allegedly seen firing a weapon toward several agents during the clash with protesters.

One detainee is dead and two more are in critical condition following a shooting at a US Immigration and Customs Enforcement field office in Dallas, according to the Department of Homeland Security.

ALT: a close up of a man 's face with curly hair and a shaved head

ALT: a man is sitting in a chair on a bus and looking out the window .

ALT: a fireworks display is going off in the dark

ALT: a man in a suit and tie is pointing at the camera .

ALT: a man wearing glasses and a vest with the word success written on it