kinshasa least four civilians police officer kill eastern democratic republic congo monday clash security force protesters demand departure president joseph kabila year human right watch say national electoral commission announce month election replace kabila whose mandate expire last december take place april 2019. delay raise fear escalation violence congo africa big copper producer activist group eastern city goma call general strike monday protest election delay unrest break a.m. 0300 gmt police protesters barricade roads burn tire local residents police say security force kill least four civilians one police officer also die clash say ida sawyer central africa director new york-based human right watch spokeswoman u.n. mission congo say document 37 arrest could yet confirm death toll provincial police commissioner placide nyembo say police officer beat death protesters one demonstrator kill stray bullet police also say statement break plan demonstration northern province tshopo protesters jerrycans fill petrol deteriorate security across congo year include spike militia violence prompt fear country could slip back multi-sided civil war turn century hundreds thousands kill violence millions believe perish hunger disease kabila say election delay due challenge register millions voters opponents say plan change constitution remain power african leaders do least five kill east congo clash human right watch