KHARTOUM, Sudan - Nearly 200 African migrants were feared drowned Tuesday after a boat carrying them to Saudi Arabia caught fire off Sudan's northeastern coast, a semiofficial news agency reported.

The Sudan Media Center said three migrants were rescued. The boat had launched from Red Sea State, one of Sudan's 26 states, and sailed for four hours in Sudanese territorial waters before the blaze broke out, according to the news agency.

Local authorities were still searching for possible survivors, it said. The report could not be independently confirmed.

The report said that the planning and execution of the illegal migrant smuggling effort took place in Port Sudan, a main port in the impoverished country. Port Sudan is the capital of the Red Sea State. The agency also said that the boat sank south of Sawaken, which is at the south tip of the Red Sea state.

The report said the owners of the boat, all Yemenis, have been arrested, although it gave no more details about them.

A second attempt to smuggle 247 migrants, mostly from Chad, Nigeria, Somalia and Eritrea, also was uncovered in the same state, the report said, without elaborating.

There have been several other incidents of illegal migrants drowning off the coast of Sudan on their way to nearby countries in past years, but the numbers have generally been smaller. Thousands of African migrants, especially Eritreans and Ethiopians, risk the dangerous routes to escape conflicts in their countries and to seek better lives in oil-rich states.

In early June, a ship carrying some 850 migrants fleeing the conflict with Libya capsized off Tunisia, and 150 of the passengers drowned.