Italy and Malta called for EU action, after 34 migrants died after their boat capsized and sank off the island of Sicily on Friday.
Some 30,100 migrants arrived by sea to Italy this year, the UN says.
Ahead of the announcement on Silvio Berlusconi's political future, a look at some of the former Italian prime minister's most famous gaffes.
Former Italian Prime Minister Silvio Berlusconi has been expelled from the Italian parliament following his conviction for tax fraud.The veteran politician, nicknamed "Il Cavaliere", dressed in black and called it a day of mourning for democracy.
Europe Correspondent Emma Murphy reports:
Former Italian Prime Minister Silvio Berlusconi has been expelled from the Italian parliament following his conviction for tax fraud.
This fraud has been examined by three different Italian courts, including the high court. Today the Italian Senate voted to strip him of his seat as the convictions were upheld.
At least 17 people have been killed in flooding and hundreds made homeless after a cylone swept over the Mediterranean island of Sardinia, Italian authorities said.
The government declared a state of emergency after Cyclone Cleopatra dropped 450mm of rain in an hour and a half overnight, causing rivers to burst their banks, sweeping away cars and flooding homes across the island.
"This is a national tragedy," Prime Minister Enrico Letta said.The declaration of a state of emergency will allow resources to be freed up more quickly to reach devastated areas, with swathes of the island under muddy flood waters that covered cars and swamped houses.
Italy has arrested a Somali man for extortion, rape and kidnapping against Eritrean migrants. The case is based on testimony from the survivors of a shipwreck that killed more than 360 migrants off the coast of Sicily in October.
Elmi Mouhamud Muhidin, 24, was one of the leaders of an armed gang involved in trafficking African migrants into Europe.
Witnesses described being kidnapped in Sahara desert between Sudan and Libya, tortured and forced to pay about £2,000 each for their freedom. According to migrants' testimony seen by Reuters, the women in the group were repeatedly raped.
If convicted, Muhidin faces a maximum prison sentence of 30 years.
Europe's tallest and most active volcano Mount Etna erupted today, spewing glowing lava into the air and sending a vast plume of smoke over the southern Italian island of Sicily.
The eruption did not cause significant disruption, though airspace over Sicily was briefly closed this morning.
The volcano is in almost constant activity, although the last major eruption was in 1992.
The latest eruption was preceded by a series of underground tremors on Friday.
Migrants who were rescued after their boat capsized and sunk in the Mediterranean claim they were shot at as they left a Libyan port.
A Syrian man, who refused to give his name fearing reprisals against family members still in Syria, told a group of reporters that the boat they were on was chased by another as soon as it left Libya and that "shots were fired" towards them.
Italian and Maltese navy ships recovered 34 bodies and rescued 206 migrants after their boat sank about 60 miles south of Sicily on Friday.
The UN High Commissioner for Refugees Antonio Guterres called for an investigation and also expressed concern that Syrians fleeing conflict have sought to reach Europe by such a perilous route, calling it "inhumane."
The UN Secretary General Ban Ki-moon and Pope Francis have joined Malta's prime minister in calling for urgent international action to prevent the catastrophic loss of life among migrants fleeing Africa in unsuitable boats.
They spoke out as another vessel laden with passengers capsized, killing around 40 people. Last week 300 people died in a similar accident. Malta's premier said the waters off Africa are being "turned into a cemetery."
Dramatic video footage released by the Italian navy shows stricken migrants being rescued from the sea after the boat they were travelling on capsized and sank.
The footage shows migrant survivors floating in the sea, before Italian naval officers come to their aid.
Officers can also be seen lifting a young baby on to a rescue boat.
Italian and Maltese navy ships have recovered 34 bodies and rescued 206 migrants after their boat sank around 60 miles south of Sicily on Friday.
Earlier this month, an estimated 311 Eritean and Somali migrants died after their boat caught fire and sank off the Sicilian island of Lampedusa.
Malta's prime minister said the people on board a boat that capsized in the Mediterranean on Friday were fleeing the conflict in Syria.
The accident follows last week's disaster off the Italian island of Lampedusa, where 339 Eritrean and Somali migrants drowned.
Joseph Muscat told Sky News:
– Joseph Muscat, Maltese PM
The difference from last week's tragedy is that these people, instead of Somalia, they hail from Syria which makes the case even more complicated and shows the immense humanitarian tragedy that the Mediterranean is experiencing right now.