Officer injured in siege back at work

A police officer is back at work after being hit in the face with a shotgun pellet at the height of a siege at a Sydney cafe that ended with the deaths of two hostages.

The 39-year-old, who can't be named, was rushed to hospital early on Tuesday morning and was discharged the same day.

It's understood he had a pellet graze on his cheek after police stormed the Lindt cafe in Martin Place in the CBD, where a gunman was holding 17 people hostage.

Shaken but undeterred, the injured officer told his superiors he would be back at work on Wednesday.

And he stuck to his word.

"My understanding is he is back at work," Police Assistant Commissioner Michael Fuller said.

"He is a very brave person.

"You think about the hostages and the police that went into that cafe and the bravery they all showed, I don't think words could ever possibly explain it."

Six people were taken to hospital after the siege, including three women with gunshot wounds.

Hostages Katrina Dawson, a barrister, and Tori Johnson, the cafe manager were killed.

Gunman Man Haron Monis died at the scene.