Police in Greece are searching for the killer of a University of California Berkeley professor who was shot and killed on July 4 while visiting Athens to see his children and attend a family custody hearing.

The ex-wife of a UC Berkeley professor shot to death while in Greece was arrested along with several alleged accomplices in the killing, Greek media reported.

A UC Berkeley professor was shot multiple times and killed in broad daylight outside in the outskirts of Athens, Greek police said.