Moscow ? Russian authorities fired a string of high-ranking security and law enforcement officials in a shake-up described Friday as part of a Kremlin push to fight graft and cement control of key government agencies.

The firing of senior officials in the Federal Customs Service, Federal Security Service, Interior Ministry and the Prosecutor General’s Office – among the most powerful agencies in Russia – was reported by local media Friday, two days after President Vladimir Putin called for a stronger anti-corruption effort in his state of the nation speech.

Government officials said little about the firings, but analysts said they could indicate a strike against what may have been a ring of corrupt officials.