NAIROBI, Oct 28 (Reuters) - Hundreds of Kenyans protested on Tuesday against a four-month government curfew imposed on the coastal county of Lamu after gunmen killed about 100 people there this year, authorities and residents said.

The government last week extended a dusk-to-dawn curfew until the end of November, saying it was meant to help police provide security in the region, close to southern Somalia.