UPDATE 1-Twenty migrants drown in Libya shipwreck, fourth accident this week

* More than 100 die in 4 shipwrecks this week
* Bodies, life jackets wash up on Libyan beaches
* Toddler, baby among the deceased

(Updates death toll, number of wrecks, adds reference to pix)
By Emma Farge
GENEVA, Nov 13 (Reuters) - Twenty African migrants are
believed to have drowned off the coast of Libya when their boat
sank as they tried to cross the Mediterranean to Europe, while
more bodies washed ashore on Libyan beaches on Friday from a
shipwreck earlier this week.
The latest shipwreck, a wooden boat that left from Surman in
western Libya, is the fourth this week and brings the total
death toll to more than 100 people, an International
Organization for Migration spokeswoman said.
Some of the survivors were from Nigeria, Gambia, Ghana and
Burkina Faso.
​ Elsa Laino of Medecins Sans Frontiers (MSF) said three
women had been rescued by local fishermen and were in a state of
trauma.
"They saw their family and relatives die in front of them
and now they are left alone in a country that is not safe," she
told Reuters.
Aid workers say that worsening treatment of sub-Saharan
African migrants in Libya as well as relatively calm seas may
have prompted the flurry of departures. Thousands of migrants
leave sub-Saharan Africa every year on a perilous journey to
Europe as they seek to escape conflict and poverty.
Earlier this week, coastguards and Spanish charity Open Arms
were involved in two other rescues where several migrants
drowned. A video by Open Arms showed a Guinean mother crying out
for her six-month-old baby who died in one of the wrecks.
On Thursday, a rubber dinghy crammed with more than 120
people aboard that had left from the town of Khums capsized.
"Staff in the region reported that more bodies continued to
wash ashore overnight," IOM spokeswoman Safa Msehli told a
briefing in Geneva.
Fisherman and the coast guard had earlier recovered 31
bodies from the first wreck, including a toddler.
IOM Chief of Staff Eugenio Ambrosi sent a Tweet on Friday
showing a picture of a tattered lifejacket which washed up on a
Libyan beach.
"Dusk of humanity," he said, in an apparent commentary on
the insufficient efforts to prevent the loss of life.
Survivors are being held in the city of Khums, Msehli said,
calling on authorities to release them and provide protection to
prevent them falling into the hands of smugglers and
traffickers.
"The worsening humanitarian conditions of migrants
detained in overcrowded centres, widespread arbitrary
arrests and imprisonment, and extortion and abuse are alarming,"
she said.
MSF's Laino said the lack of search and rescue teams in the
Mediterranean was contributing to the high death toll.
More than 900 people have died this year attempting the
Mediterranean crossing to reach Europe. Thousands more have been
stopped at sea and returned to Libya where they are often
vulnerable to exploitation and abuse.