(NBC NEWS) A suicide bomber blew himself up at an entrance to the U.S. Embassy compound in Ankara on Friday, killing at least three people, Turkish police sources said.

The bomber got to the first X-ray machine leading to the visa section, the sources added.

U.S. Ambassador Francis Ricciardione told reporters that a guard at the gate was killed and a Turkish citizen was wounded in the blast, which happened at 1:15 p.m. local time (6:15 a.m. ET), The Associated Press reported.

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