Italian police have arrested five migrants accused of the grisly murder of scores of fellow would-be refugees when fighting broke out on a boat making the treacherous crossing to Europe, local media reported.
Italian and Maltese naval crews last Saturday discovered 30 bodies - including that of a baby - of passengers who had apparently been overcome by heat and engine fumes after being locked in the hold of a boat carrying more than 560 mostly-Syrian migrants, according to the reports.
And police in the Sicilian port of Messina, where the survivors were brought, were said to believe a further 110 people had been thrown into the ocean by their fellow passengers on the horrific crossing from Tunisia.
Survivors told police grim details of how a journey to a better life turned into a nightmare for many aboard.
They described what they witnessed on the boat as a massacre, police told media.
According to the witnesses, migrants locked in the hold panicked as air ran out, forced the door open and stormed the bridge.
The boat began to founder, and fighting erupted between two groups of passengers on the bridge - one that wanted to brave the high seas and continue the voyage, and another that wanted to return to Tunisia.
Witnesses reportedly claimed that, in the chaos, many people were stabbed, while others were thrown overboard in a bid to keep the vessel afloat.
Messina's chief of police estimated that 50 of the migrants were thrown overboard, and around 60 were stabbed and then thrown into the sea.
The five men arrested were said to be a 21-year-old Syrian, two Moroccans aged 21 and 25, a Palestinian of 25 and a Saudi aged 32.
Three of the men tried to escape, according to the Italian media, and had bus tickets for Milan in northern Italy in their pockets.
The three Tunisian traffickers, who apparently did nothing to stop the massacre, were also arrested by the police on Monday.
The gruesome tale is the latest tragedy to emerge from the decks of a relentless barrage of migrant boats seeking to reach Europe.
In the last week more than 1 700 migrants were rescued in Italian territorial waters, the navy said, many of them women and children. In early July, about 2 000 were plucked from the sea on only one weekend.
There has been a sharp rise in migrant landings in recent weeks because of the calm summer weather and growing lawlessness in Libya.
Around 80 000 migrants are now believed to have landed in Italy so far this year - higher than the previous record of 63 000, set in 2011 at the height of the turmoil triggered by the Arab Spring.
The deaths of hundreds of boat migrants during their voyages across the Mediterranean has thrust the issue into the public eye, and sparked growing tensions in the EU.
Border countries such as Italy complain they are being abandoned by their European partners to deal with the massive influx of people, while northern countries insist they have their own migrants to deal with.
The Italian navy launched operation Mare Nostrum (Our Sea) in October after 360 illegal migrants drowned off the island of Lampedusa in a disaster that shocked Europe and beyond.
“It's an unbearable burden for a single member state,” the navy's fleet commander-in-chief, Admiral Filippo Maria Foffi, who runs Mare Nostrum, said earlier this month. - Sapa-AFP