Things have gone from bad to worse for tourism in Kenya, with a grenade attack in the capital Nairobi injuring 12 people.

The latest outrage comes after the kidnap of several western tourists on the border with Somalia.

Earlier this morning a grenade was thrown into the Mwauras club, however the resulting explosion is not believed to be linked to the Somali militant group al-Shabab, who are behind the recent kidnappings.

Al-Shabab has threatened reprisals if the Kenyan troops send into Somalia did not leave.

Police have cordoned off an area of central Nairobi following the attack.

No group has so far admitted carrying out the attack.

The US embassy in Nairobi warned on Saturday of an “imminent threat” of attacks in Kenya.

The British Foreign & Commonwealth Office (FCO) confirmed it was aware of credible information suggesting the threat of a terrorist attack in Kenya. 

Kenyan institutions could be targeted as could places where foreigners gather, added a statement.

Earlier this month Marie DeDieu, a French citizen, was abducted from a private residence in Manda Island.

She later died while still being held.

In an attack in September, gunmen shot Briton David Tebbutt and kidnapped his wife Judith from Kiwayu.