As many as 64 refugees are feared to have died after a traffickers’ overcrowded rubber dinghy sank in what is thought to be the first shipwreck in the Mediterranean Sea this year.

Humanitarian groups who spoke with survivors said 86 people were rescued from the boat hours after it took on water and started deflating.

Eight bodies, six women and two men, were recovered from the dinghy, a UN migration agency official said.

Flavio Di Giacomo, a spokesman for the International Organisation for Migration (IOM), said the boat was carrying 150 migrants aboard the dinghy when it set out from a Libyan beach east of Tripoli.

“Sixty-four migrants lost their life in the shipwreck [which] occurred last Saturday,” Mr Di Giacomo wrote on Twitter, saying “probably 56 missing migrants” perished at sea.

In pictures: A day of refugee rescues in the Mediterranean Sea Show all 7 1 /7 In pictures: A day of refugee rescues in the Mediterranean Sea In pictures: A day of refugee rescues in the Mediterranean Sea A baby being taken on to MSF's Bourbon Argos ship from a boat carrying 130 migrants and refugees Lizzie Dearden In pictures: A day of refugee rescues in the Mediterranean Sea A refugee boat carrying 101 people being rescued by MSF's Bourbon Argos Lizzie Dearden In pictures: A day of refugee rescues in the Mediterranean Sea A refugee boat carrying 101 people being rescued by MSF's Bourbon Argos all images by Lizzie Dearden In pictures: A day of refugee rescues in the Mediterranean Sea A baby among refugees on a boat carrying 185 people off the coast of Libya Lizzie Dearden In pictures: A day of refugee rescues in the Mediterranean Sea Migrants and refugees sleeping after being rescued by MSF's Bourbon Argos ship Lizzie Dearden In pictures: A day of refugee rescues in the Mediterranean Sea A crew from MSF's Bourbon Argos ship rescuing a boat carrying 130 migrants and refugees off the coast of Libya, at sunrise Lizzie Dearden In pictures: A day of refugee rescues in the Mediterranean Sea A woman in a stretcher being lifted onto MSF's Bourbon Argos ship from a boat carrying 130 migrants and refugees off the coast of Libya Lizzie Dearden

Mr Di Giacomo told the Associated Press the dinghy was packed and made of poor quality rubber.

Some eight hours into the Mediterranean crossing, “water started pouring in, panic ensued, the migrants all moved to one side, and the boat lost its balance and was deflating.”

Some migrants managed to cling to the portion of the dinghy that wasn’t submerged but many others fell into the sea, he said, adding that the Italian coast guard arrived quickly, about a half hour after being spotted by a European naval aircraft.

The migrants came from Mali, Gambia, Ivory Coast, Sierra Leone, Cameroon, Senegal and Nigeria, he added.

Among those who vanished beneath the waves “were many children who are believed to have drowned at sea,” the humanitarian organisation Medecins Sans Frontieres (MSF) said on Twitter.

“Among the survivors was a three-year-old child who has lost her mother and arrived alone, and a family of 11 now a family of three.”

The Italian coastguard said the migrants had been spotted on Saturday morning by a plane patrolling the seas on behalf of a European anti-smuggling operation. Rescuers believe their dinghy deflated following a puncture.

Such boats are regularly crammed with migrants by people smugglers operating from Libya and were never built to withstand crossing the Mediterranean Sea.

Refugee shipwreck survivors arrive in Italy

Tommaso Fabbri, the head of the MSF mission in Italy, criticised the policies of Italian and European authorities who are trying to prevent migrants leaving the North African state in the first place.

“Only by opening legal, secure, stable and sustainable routes for those seeking protection will it be possible to prevent desperate people putting their own and their children’s destinies in the hands of traffickers,” he said in a statement.

Hundreds of thousands of migrants have been rescued at sea and taken to southern Italian ports in the last few years, including nearly 119,000 last year. Another 3,100 drowned along the way in 2017, the IOM says.

The majority of those putting themselves at the mercy of smugglers and the sea are African refugees fleeing wars or persecution as well as economic migrants.

Italy is working with various groups and authorities in Libya in an attempt to slow the flow of newcomers.