At least 16 people were killed and three injured in a firebomb attack on a restaurant in Cairo, Egyptian state media said Friday.

The MENA news agency said three men on a motorcycle threw Molotov cocktails into the restaurant, which also houses a nightclub, in the city’s Agouza district and then fled.

Other reports suggested one of the attackers may have been a disgruntled ex-employee.

The fire was quickly put out and an investigation is underway.

Egypt’s capital has seen attacks by Islamist militants in recent times and last month, a Russian jetliner carrying 224 people crashed in the country’s Sinai Peninsula, killing everyone one board.

The Islamic State said it planted a bomb on the plane.

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