"We can confirm that four people have been killed so far," Abdiaziz Rashid, an official of Kenya Red Cross, told The Anadolu Agency by phone.

"That is the much we can confirm for now and 32 people injured, including officers," he said.

"The shooting is still on and I believe we still have hostages held in one of the hostels," asserted Rashid.

Two of the four killed are guards while the two others are believed to be police officers. 

In a statement, Kenyan police said the attackers had forced their way into Garissa University by shooting at the guards manning the main gate at around 5.30 am.

"The attackers shot indiscriminately while inside the compound," it said.

Police asserted that reinforcement had been called and the gunmen had been cornered at one block.

According to police, some 100 students and teachers had been rescued. 

Some of the rescued students spoke of at least five gunmen.

The Garissa University College is about 3km from Garissa town and less than 200km from the border with troubled Somalia.  

The campus population is estimated to be about 300 students, mainly from other parts of the country.

No group has claimed responsibility for the attack although similar raids in the past were blamed on the Somali militant group Al-Shabaab.

Most of the public universities in northern Kenya had sent their students home following intelligent reports of an attack by Al-Shabaab during the Easter holidays.

Anadolu Agency