A grenade was thrown into a discotheque in Kenyan capital Nairobi early Monday injuring 14 people, all Kenyans, in an attack police linked with recent threats made by Somali Shebab insurgents.

"Yes, we are linking the grenade attack to the threats that have been issued by Shebab and that is why I am appealing to city residents to be vigilant and cooperate with our officers," Antony Kibuchi, provincial police chief for Nairobi, said.

The US embassy in Nairobi had warned Saturday of an "imminent threat" of attacks possibly targeting foreigners, one week after Kenyan forces crossed into Somalia to hunt down Al Qaeda-linked Shebab fighters.

The embassy cited "credible information of an imminent threat of terrorist attacks directed at prominent Kenyan facilities and areas where foreigners are known to congregate, such as malls and night clubs."

"We will remain alert and we urge members of the public to remain alert as well," Kibuchi declared. "We have heightened security patrols and enforcement in the city."

The red-painted Mwauras disco is in the bustling centre of Nairobi, popular with night-clubbers. An AFP journalist said few signs of damage were apparent from the outside of the building, which was guarded by a dozen police.

The injured were taken to Nairobi's Kenyatta National Hospital. A nurse said six of them suffered "bad injuries on the faces and head" while the rest had "minor injuries on the hands and legs."

At the hospital, victims told of panic in the discotheque as the attack happened.

Lawrence Kioko, chef in a Nairobi Japanese restaurant, had gone out to make a phone call before the incident.

"When I came back I ordered a drink and before I could even take a sip, I heard a loud explosion, and there was a small metal object that fell near my legs, and there was confusion all over the place, everyone was running and I realized there was blood all over my face," Kioko said.

"I have suffered injuries on my face and legs, I even don’t know how I came here," Kioko told AFP from his bed in the emergency ward at the Kenyatta National Hospital.

Another victim, Kevin Otieno, said: "I had been in the club since midnight and there was no problem at all. There was music and everything seemed OK until when the loud blast occurred. I am told someone threw something inside but I don’t see him.

"I am too lucky to be alive because it was like hell the kind of confusion and the pain I suffered after it occurred."

Jonah Mwangi, who sells matatu (local bus) tickets, said he had gone to purchase cigarettes and decided to have a drink.

"I wish I bought the cigarettes and left, I decided to have a drink and that is when this explosion happened. It was so loud and immediately I started feeling pain and blood splashing at me and we were just trying to get out."

"Because there was one entrance, it took a lot of time because the entrance was so small", he said, bandages all over his face.

Last week, Kenya sent troops across its border with Somalia to hunt Shebab insurgents it blames for the abductions of a British tourist, a disabled French woman who has since died in captivity and two Spanish aid workers.

The radical Islamist Shebab, who deny kidnapping foreigners, have repeatedly warned of bloody retaliation.

i think the battle has just begin for Kenya.

This is the wish of the west for Africa(instability in Africa) so they can use that as a excuse to recolonize us, I dey laugh!!!

These shabs are nothing.Silly dudes fighting a psychological war.

AL shabaab taken over the coast of Kenya wat are you talking about Yes a foreigner was kidnapped in Lamu in the far north coast which had no bearings on what happens at malindi mombasa,diani or any other part of the coast.And secondly,Al shabaab cannot operate anywhere discreetly in kenya except NEP and Eastleigh in Nairobi where they are a majority.There are less than 10,000 somalis at the kenyan coast,the inhabitants are mostly mijikenda,swahili and arabs(who are harmless)
There has never been an incident of piracy within Kenyan waters.True kenyan vessels have been hijacked.In somali waters.
We will blast the Somali Islamic Emirate aka Al shabaab out of Jubaland like we are doing now

I even forgot the war is still on. There's peace in the country and enough security so far.