Three dead at burnt headquarters of Congo opposition party - witness

An injured Congolese opposition supporter walks outside the headquarters of the Union for Democracy and Social Progress (UDPS) during violent protests to press President Joseph Kabila to step down, in the Democratic Republic of Congo's capital Kinshasa, September 20, 2016. REUTERS/Kenny Katombe

KINSHASA (Reuters) - At least 44 people - including 37 demonstrators and six police officers - have been killed in protests over Congolese President Joseph Kabila's perceived bid to extend his rule, Human Rights Watch (HRW) said on Tuesday.

The unrest in the Democratic Republic of Congo started on Monday after its election commission decided to try to postpone the next presidential vote, due in November.