Sharjah24 - AFP: Spain's emergency services said on Saturday that hundreds of migrants had been rescued from four vessels off the Canary Islands, while four migrants had perished.

As controls have been tightened in the Mediterranean, the Canaries route has become a favourite for people fleeing poverty and conflict in Africa -- most of them on overcrowded, barely seaworthy vessels.

Two boats carrying a total of 254 migrants in good health were intercepted on Friday evening and escorted to La Restinga port on El Hierro island, rescuers said on X, formerly Twitter.

At dawn on Saturday a third vessel loaded with 238 migrants was located and escorted to safety.

Thirteen people were hospitalised, and two died despite medical treatment, the rescuers said.

Two people also died aboard a fourth vessel carrying 247 migrants on Saturday morning. A third person was admitted to hospital.

The latest arrivals came after authorities in the Atlantic archipelago issued a weather alert for strong winds and waves up to 5.5 metres (18 feet) high, according to rescuers.

Data from Spain's interior ministry show 30,705 migrants reached the Canaries between January 1 and October 31, more than double the number of arrivals for the same period last year.

The first fortnight of last month alone saw 8,561 arrivals -- a record for a two-week period since a previous migration crisis in 2006.