The hunt for a renegade nephew of Kuwait's emir has turned up a gun disguised as a pen in his home, adding yet another layer of mystery to a case involving two other ruling family members.

Kuwait's Interior Ministry issued a statement Monday saying officers raided the home of Sheikh Athbi al-Fahad Al Sabah and found the weapon with a Kalashnikov rifle, a handgun and ammunition.

Prosecutors say Sheikh Athbi, the former head of Kuwait's National Security Office, was sentenced to five years in prison over a plot to publish anonymous Twitter posts sharing fabricated videos of judges receiving bribes. The sentence is appealable.

Sheikh Athbi has been on the run since the May 30 verdict.