Picture emerging of Baton Rouge gunman...Security concerns in Cleveland...More police in Istanbul

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BATON ROUGE, La. (AP) — Radio exchanges indicate Baton Rouge law enforcement officers were investigating a report of a man with an assault rifle when six of them were shot this morning. The exchanges made available by the website Broadcastify indicate nearly six minutes passed before the officers were able to determine the shooter's location. Three were killed and one is in critical condition. The attack came less than two weeks after a black man was fatally shot by police. Videotape of that confrontation has prompted nightly protests in Baton Rouge.

BATON ROUGE, La. (AP) — A picture is emerging of the gunman who killed two police officers and a sheriff's deputy in Baton Rouge, Louisiana, this morning. Authorities have identified him as Gavin Eugene Long, a former Marine sergeant who served in Iraq and had no known ties to any extremist groups. Military records show he received several medals during his military career, including one for good conduct, and received an honorable discharge. Long's last known address was in Kansas City, Missouri.

CLEVELAND (AP) — The fatal shooting of three police officers in Louisiana has added new concerns about security at the Republican National Convention. Huge crowds are expected for protests and the city police chief is preparing officers to deal with the open carrying of weapons, which is allowed by state law. The head of the Cleveland police union asked Ohio Gov. John Kasich to suspend that law during the convention, but the Republican says he doesn't have the authority to "arbitrarily" alter laws and constitutional rights.

CINCINNATI (AP) — Ohio Gov. John Kasich (KAY'-sik) has condemned the slayings of police officers and urged working together for healing in his appearance at the NAACP national convention. The Republican spoke to the nation's oldest civil rights organization this evening in Cincinnati. Kasich pointed to his Ohio initiative that created a statewide collaborative effort on police and community relations.

ISTANBUL (AP) — Turkey's state-run Anadolu news agency says 1,800 special forces police officers have arrived in Istanbul from neighboring provinces, taking up positions in critical facilities and patrolling the city. The report says Istanbul's police chief has ordered the shooting down of any helicopters flying overhead without warning. Anadolu also reports that President Recep Tayyip Erdogan (REH'-jehp TY'-ihp UR'-doh-wahn) has ordered F-16s fighter jets to patrol Turkish airspace nationwide, following Friday's failed coup attempt.