Three years ago al Shabaab militants attacked a Kenya Defence Forces quarters in Somalia killing an unknown number of soldiers.
The militants rammed a suicide car bomb into the gates of the base in Ceel Cado, about 550 km west of Mogadishu, near the Kenyan border, before their fighters burst inside.
The attack was reportedly launched against a company-size force of soldiers but it was not clear if this was the size of the Kenyan contingent in the area.
A military company can range between 80 to 250 soldiers.
Rescue mission at 14 Riverside Drive, Westlands/PATRICK VIDIJA
Read: How two KDF soldiers survived El Adde al Shabaab attack
Also read: Kenya continues to cover up death toll in 'bloody' El Adde attack- CNN report claims
Since the attack, the al Shabaab have vowed to get back at the Kenyan forces with many attempts that have been thwarted in the past.
President Uhuru Kenyatta announced that Kenya will not pull out of Somalia, despite many soldiers being killed.
He said KDF will pursue al Shabaab terrorists “to their last hideouts”.
Read: KDF will stay in Somalia, says Uhuru Kenyatta
Tuesday marked the third anniversary of the El Adde attack and al Shabaab terrorists made their way to 14 Riverside Drive in Westlands.
Al Shabaab have claimed responsibility for the attack.
"We are behind the attack in Nairobi. The operation is going on. We shall give details later," Abdiasis Abu Musab, al Shabaab's military operations spokesman, told Reuters.
There was confusion as DCI George Kinoti was seen trying to evacuate people and ushered in ambulances in the area.
People watch ongoings after Westlands attack /PATRICK VIDIJA
Vehicles were set ablaze as orange flames and dark smoke engulfed the area.
Recce squad could bee seen moving around the building as others tried to enter and rescue the hostages.
Sirens were heard along Waiyaki Way as panic rented the air.
More on this: {VIDEO} Blast, heavy gunfire at 14 Riverside Drive, Westlands
Several people at the building pleaded for help on social media with others contemplating the worst.
"I am in 14 Riverside Drive hiding in a bathroom and we are under attack, we need help," @ronald_ngeno said.
Another witness said "Still lots of intermittent shooting, and burning cars still exploding. I saw four armed men enter and start shooting."
SAFETY TIPS DURING AN ATTACK
- Don't give too much information and show graphic pictures of the event on social media
- Keep the identity of any victims concealed until the situation has been resolved or their names have been released by the authorities
- Do not provide vital information or offer comfort or support to the perpetrators.
- Don’t publish false statement, rumours likely to cause fear and alarm to the public
- Government requested to designate a person to be in charge of information sharing
- Timely updates and proactive information disclosure to the media and public is highly encouraged.



