Egypt migrant boat capsize: Hundreds feared dead
Survivors from a boat which capsized off the Egyptian coast on Wednesday have told the BBC that hundreds of people may have drowned.
The boat was carrying between 450 and 600 migrants when it capsized eight miles (12km) off the coast, they say. The numbers have not been confirmed.
Authorities say they have rescued 163 people and recovered 51 bodies so far off the port city of Rosetta.
Four crew members have been arrested, Egyptian officials said.
They are suspected of involuntary manslaughter and human trafficking, judicial officials were reported as saying.
The incident came after the EU's border agency warned that increasing numbers of Europe-bound migrants are using Egypt as a departure point.
The UN says that more than 10,000 people have died crossing the Mediterranean towards Europe since 2014.
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The boat was kept off the coast for five days as more and more migrants were brought on board, survivors told the BBC's Orla Guerin in Rosetta.
The boat is said to have capsized after a final group of some 150 people were crammed on board.
Authorities have been accused of failing to send help fast enough.
"Anyone who was saved here, was saved by the local fishing boats," fisherman Abdelrahman Al-Mohamady told the Reuters news agency.
The International Organization for Migration said those rescued included 111 Egyptians, 26 Sudanese, 13 Eritreans, a Syrian and an Ethiopian.
Many survivors are now being held in police custody.
Rescuers are focusing their efforts on the boat's cold storage room, where it is believed around 100 people took refuge during the capsize.
There is still uncertainty over the exact number of migrants who were on board the vessel before it capsized, with estimates between 450 and 600.
The number of deaths is expected to rise.
Some teenage Egyptian survivors, huddled together in the basement of a police station, told the BBC they were trying to reach Italy to find work.
The Egypt office of the International Organization for Migration (IOM) say high birth rates and few job opportunities are pushing young Egyptians into taking the risk of a dangerous sea voyage.
Authorities say Egyptians in police custody will soon be released but foreign nationals will be held for a few days for questioning as to how they entered the country.
Human rights researchers warned last month of a "devastating" lack of information for families of migrants thought to have drowned in the Mediterranean,
IOM figures, released in July, suggest 2016 could become the worst year to date for migrant deaths.
It said about 3,000 migrants and refugees had lost their lives so far this year trying to cross the Mediterranean.
EU border agency Frontex says more than 12,000 migrants arrived in Italy from Egypt between January and September, compared with 7,000 over the same period in 2015.
It says Egypt is the "new hotspot" for people smugglers, with concerns that its population of about 80 million people may pose a major problem should it descend into chaos.
Frontex director Fabrice Leggeri said that work was being done to determine whether there was a link between the drop in numbers departing from Turkey - where only about 50 people a day are trying to make the journey to reach Greece compared to thousands this time last year - and the increase in numbers from Egypt.
However, officials say Libya still remains the biggest departure point with flows at around the same level this year as last year.
A note on terminology: The BBC uses the term migrant to refer to all people on the move who have yet to complete the legal process of claiming asylum. This group includes people fleeing war-torn countries such as Syria, who are likely to be granted refugee status, as well as people who are seeking jobs and better lives, who governments are likely to rule are economic migrants.