Israeli crime boss Ze'ev Rosenstein, who is currently serving 12 years in jail for trafficking Ecstasy pills to the United States, was arrested in prison on Tuesday for allegedly orchestrating a 2001 triple murder in Tiberias.
A Ramle court has extended his remand by another six days.
Israel Police's central unit last October arrested a number of underworld figures, including Amir Mulner, chief suspect in the international "North Star" drug smuggling network that recently attempted to smuggle 108 kilograms of cocaine from Panama to Israel.
Rosenstein pleaded guilty in 2007 to conspiring to smuggle 700,000 Ecstasy pills from Europe into the United States. He was extradited from the U.S. to serve his sentence in Israel.
He was also convicted of hiring Colombian mercenaries to target members of the Alperon family, also considered crime kingpins. For that, Rosenstein was be sentenced to three years in prison, to be served concurrently with his 12-year term.