Oct 18 (Reuters) - Algeria on Monday lifted an overnight curfew that was imposed in parts of the country last month to help contain the spread of COVID-19 contagion, the prime minister"s office said in a statement. The curfew, running from 11 p.m. to 5 a.m., was in effect in 23 out of 58 provinces in the North African country. Gatherings, weddings, and social events are still under a ban, the statement said.