A cabinet minister says the Somali President will do all he can to trace a suspect in the murder of a policewoman, killed six months ago.
Mustaf Jamma is believed to have fled to Somalia
International Development Secretary Hilary Benn spoke to President Yusuf while on a trip to Somalia.
Police believe Mustaf Jamma, a Somali national, fled Britain after being named as a suspect in the murder of constable Sharon Beshenivsky.
The 38-year-old officer was shot dead responding to a robbery in Bradford.
Mr. Benn, who is also a Leeds MP, told the BBC President Yusuf had promised to do his best to locate Jamma and had asked for photographs and details.
He said: "I very much welcome the interest he took in this case.
Pc Sharon Beshenivsky was shot while on duty in Bradford.
"There is very strong feeling about this crime in Yorkshire."
President Yusuf's power in Somalia is limited because his government has been wracked by infighting and unable to assert control over much of Somalia that has been in the throes of anarchy for 15 years.
It has emerged that Jamma was considered for deportation after serving a jail term last year but allowed to stay in the UK because Somalia was thought too dangerous.
Now it is believed he has returned there.