The shooter who fired on multiple people at an immigration centre from a rooftop in Dallas, Texas, killing one person, before then turning the gun on himself has been pictured for the first time.

Joshua Jahn, 29, allegedly shot three detainees at the Dallas ICE facility on Wednesday. Police said that at least four people were shot and one inmate died following the shooting.

The FBI said bullets found next to the gunman were inscribed with anti-ICE messages. Joseph Rothrock, head of the Texas FBI field office, said: "I could also share with you is that early evidence that we’ve seen from rounds that were found near the suspected shooter contain messages that are anti-ICE in nature. Again, this is just the most recent example of this type of attack."

A witness said she heard around 20

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