UPDATE 1: The number of people killed by this attacked rises to 147.
Watch BBC Video News Update Below
At least 70 hostages have been killed in an attack by al-Shabab Islamist militants on a university in north-eastern Kenya, officials say.
At least 79 were injured while more than 500 students were rescued from the Garissa University College campus, disaster management officials said.
Interior Minster Joseph Nkaiserry said four of the attackers had been killed, and security operations were ongoing.
An overnight curfew has been issued in parts of the country.
Four counties near the Kenya-Somalia border, Garissa, Wajir, Mandera and Tana River, would have dusk-to-dawn curfews imposed, disaster management officials said.
Nine students were critically injured and airlifted to the capital Nairobi for medical treatment, they added.
Live updates from Garissa siege
BBC News Updates on the Attack.
More than 500 out of 815 students have now been accounted for, the interior ministry says…. Read More on BBC