Police in Israel have arrested six people, including Prime Minister Benjamin Netanyahu’s former chief of staff and a former navy commander, as part of an investigation into alleged corruption surrounding the purchase of German submarines, according to media reports.

David Sharan, an American-born former Netanyahu aide, was reportedly arrested on suspicion of accepting bribes, fraud, breach of trust and conspiracy.

A court extended Mr Sharan’s detention by five days.

Police could not immediately be reached for comment.

Sunday’s arrests are the latest in a probe into suspected corruption surrounding the 2 billion dollar (£1.54 billion) deal with German manufacturer Thyssenkrupp.

Mr Netanyahu is not a suspect in the case, but his personal lawyer, who is also his cousin, is involved.

Police have questioned Mr Netanyahu over separate corruption allegations. He has denied any wrongdoing.