Story highlights Clashes between militias come after a relative calm in Libya

In 2015, the UN created the Government of National Accord

Tripoli, Libya (CNN) At least 47 people were killed in fierce clashes between rival militias in Libya, the Ministry of Health said.

The fighting in Libya's capital of Tripoli injured 183 others and officials said they expect more casualties.

Violence began Friday when anti-government militias launched an offensive called "Libya pride" against the United Nations-backed Government of National Accord (GNA).

Residents heard loud explosions, gunfire and tanks rolling down the streets. Photos circulating on social media showed plumes of smoke rising in different areas and militiamen on the streets.

"Can hear explosions and artillery fire in south Tripoli. Condemn action by these militias who threaten security of Libyans, especially before Ramadan," British Ambassador to Libya, Peter Millett wrote on Twitter.

Can hear explosions & artillery fire in south #Tripoli. Condemn action by these militias who threaten security of #Libya-ns esp b4 #Ramadan — Peter Millett (@PeterMillett1) May 26, 2017

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