Somalia's government says it will impose a curfew in Mogadishu, where at least five people were killed Thursday in the latest violence to hit the capital.
Officials say starting Friday no one will be allowed outside from seven at night until five in the morning.
The head of Somali's intelligence service Mohamed Warshame Darwish says the curfew will continue until security improves in the city.
Witnesses said Thursday an unknown assailant threw a hand grenade into the crowded Bakara market, killing at least three people.
The attack occurred shortly after a shootout at the market killed two other people. Police were involved in the shooting, although it is not clear what caused the incident.
Violence claims lives nearly every day in the Somali capital, where the interim government has struggled to establish authority since driving out an Islamist movement late last year with the help of Ethiopian troops.
On Wednesday, Ethiopian troops killed eight people after a roadside bomb damaged a truck and wounded soldiers. On Tuesday, a gunman shot and wounded a spokesman for President Abdullahi Yusuf.
The government has blamed the violence on Islamist insurgents and terrorists, although clan militias are also believed to be involved.
Some information for this report was provided by AFP, AP and Reuters.