Somalia received a pledge of aid for $50 million from Saudi Arabia this month on the same day it announced it was cutting ties with Saudi rival Iran, a document seen by Reuters showed.

The government, which did not confirm or deny the pledge, has said there was no link between long-running Saudi financial support and its diplomatic decision to break ties with Iran.

A document from the Saudi embassy in Nairobi to the Somali embassy in the Kenyan capital showed the kingdom pledging $20 million in budget support and another $30 million for investment in Somalia, a nation trying to rebuild after two decades of war.

The two grants would come from the Saudi Development Fund, according to the document that was dated Jan. 7, the same day Somalia cut ties with Tehran.

Somalia cut relations with Iran saying Tehran had meddled in Somali affairs and threatened national security.

Mogadishu gave Iranian diplomats 72 hours to leave.

Somalia's Finance Minister Mohamed Aden Ibrahim declined to comment on the pledges, but said any financial assistance from Saudi Arabia was not related to Mogadishu's stance against Iran.

"Our relationship with Saudi Arabia was long-standing and is not something that has just started," the minister told Reuters.

Several other Arab states such as neighbouring Bahrain, a long-time close ally and recipient of Saudi largesse also cut ties. Other wealthier Gulf states withdrew envoys.

Sudan, which like Somalia and Saudi Arabia is a member of the Arab League, said it had cut ties with non-Arab Iran.

Somalia's ties with Saudi Arabia have grown as it tries to rebuild a nation while battling a terrorist insurgency, although Turkey and western countries remain among the biggest and more prominent donors to the country.

Somalia's president, Hassan Sheikh Mohamud, met King Salman bin Abdul Aziz al-Saud in Saudi Arabia in October. A Saudi team had visited Somalia in late 2015 to discuss further Saudi support for the country.

"Any financial and other requests that we made to the Saudis were way before" Somali cut ties with Iran, Foreign Minister Abdusalam Omer told Reuters.