An attack by armed men in northeastern Kenya has left one dead and a dozen others wounded, the Kenya Red Cross says.

The humanitarian institution said one person was killed and 12 others were taken to hospital after the gunmen hurled grenades and sprayed bullets at a store in Wajir on Monday evening.

There were reports of "three blasts and gunshots heard around the area of Ngamia Club" in Wajir, where Somalia's al-Shabab militants and other militia groups have carried out several raids.

A Kenyan police officer said the assault was probably carried out by the Takfiri militants, but there was no immediate claim of responsibility.

Kenya’s Interior Ministry also said on Twitter that three armed men launched the attack.

Last month, the al-Shabab militants executed 28 people in an ambush on a bus in the town of Mandera near the Somali border.

Kenya currently has over 3,000 soldiers stationed in southern Somalia, where they have been battling al-Shabab. The country sent troops into Somalia in late 2011, after the militant group carried out a series of raids inside Kenya.

The al-Shabab militants have been pushed out of the Somali capital, Mogadishu, and other major cities in the country by the African Union Mission in Somalia, which is made up of troops from Ethiopia, Uganda, Burundi, Djibouti, Sierra Leone, and Kenya.