BROOKLYN - Police are investigating three shootings since yesterday afternoon that have left three people dead.

Cops say four men were shot early this morning at 1-09 East 54th St. in East Flatbush. They were taken to Kings County Hospital, where 18-year-old Gary Tyrief died.

In Brownsville, 24-year-old Donavan Dallison was found shot in the head late last night at the Unity Plaza Houses on 5-85 Blake Ave. and was pronounced dead at the scene.

The third shooting occurred yesterday afternoon when two men were shot in front of the Marcy Houses at 1-25 Nostrand Ave. in Bedford-Stuyvesant. Police say a 26-year-old man died after being taken to Woodhull Hospital. The second victim, a 22-year-old man, was taken to Kings County Hospital and is expected to recover.

No arrests have been made in any of the shootings. Police are asking anyone with information to call Crime Stoppers at 1-800-577-TIPS.