Occupied Jerusalem — Israeli Prime Minister Benjamin Netanyahu's diplomatic envoy was identified Tuesday as one of two men questioned this week in a probe into suspected corruption around the purchase of German submarines.

Yitzhak Molcho was on Sunday and Monday questioned by police along with David Shimron, a relative of Netanyahu and his family lawyer who also represented German industrial giant ThyssenKrupp in Israel.

Authorities released their identities on Tuesday.

Molcho, a lawyer who partners with Shimron and is also a relative of the Netanyahus, announced last month that he would step down from his position as Netanyahu's envoy in February next year.

While his position had no formal title, Molcho led peace negotiating teams with the Palestinians and served as the Israeli premier's pointman for resolving sensitive issues with Egypt and Jordan.

Police refused to divulge why Molcho was questioned, saying merely it was part of the submarine affair, but media said he was suspected of having used his position to advance the deal.

Last month, Germany signed a deal to sell three Dolphin submarines from ThyssenKrupp to the Israeli navy.

Negotiations on the sale had been frozen for three months due to concern in Berlin over the corruption investigation in Israel.

The investigation involves officials from the Israeli security establishment as well as those working locally for ThyssenKrupp.

Shimron has already been detained for questioning over the affair.

Netanyahu himself has not been named as a suspect in the submarine case.

He is however being investigated in two separate graft probes and is expected to be interrogated again in the coming days.

The two other probes involving Netanyahu centre on the premier allegedly receiving luxury gifts from wealthy supporters and suspicions he sought a secret deal for favorable coverage with the publisher of top-selling daily Yediot Aharonot. — AFP