Bahrain’s top military court sentenced six men to death on Monday after convicting them of charges including plotting to assassinate the Gulf state’s armed forces chief, state media reported.

It was the first official mention of any plot to kill Field Marshal Sheikh Khalifa bin Ahmed Al-Khalifa, who is a member of the ruling family, but the Bahrain News Agency (BNA) gave no further details of when or where it was alleged to have taken place.

A judicial source told AFP that all six of those sentenced to death on Monday were Shia.