At least 23 people have been killed in Bangladesh as clashes erupted between police and anti-government protesters who are demanding that Prime Minister Sheikh Hasina step down.

The latest round of tension comes as the student leaders have declared a campaign of civil disobedience against the government.

Police have used tear gas and rubber bullets to disperse demonstrators in several parts of Bangladesh. Around 200 people have been injured.

In the capital, Dhaka, access to internet on mobile devices has been suspended, with some providers telling local media they received orders from the government.