Ehud Barak
Ehud Barak Flash 90

Former prime minister Ehud Barak wrote on social media Saturday evening that Israel has an "obligation to investigate" the proposed sale of a German submarine reportedly being brokered by a close confidant of the current premier.

"Submarines are vital, but more essential is the public trust," Barak wrote on Twitter. "There are a lot of question marks," he continued, adding "therefore, as suggested, there's an obligation to investigate."

Barak posted the statement following a Channel 10 report that claimed Prime Minister Benjamin Netanyahu was utilizing his personal lawyer and relative, David Shimron, in order to purchase three new submarines from Germany..

Following the report, Attorney-General Avichai Mandelblit on Thursday asked State Attorney Shai Nitzan to examine the arms acquisition from Germany.