* Some 60,000 African migrants live in Israel
* Israel sees them as illegal job-seekers
* Human rights groups call them refugees (Adds quotes from protester)
By Baz Ratner
TEL AVIV, Jan 6 (Reuters) - Several thousand African migrants protested outside Western embassies in Tel Aviv on Monday, demanding freedom for compatriots jailed by Israel in a desert facility under a new open-ended detention law.
"No more prison," chanted the crowd that packed a Mediterranean beachfront promenade across from the U.S. Embassy.
Protesters also marched to the French, Italian, British, Canadian and German embassies to hand over letters appealing for international support against Israel's detention policy toward migrants it sees as illegal job-seekers.
Three weeks ago, Israel's parliament approved the law permitting authorities to detain migrants without valid visas indefinitely. The measure has been condemned by critics as a violation of human rights.
Some 60,000 migrants, largely from Eritrea and Sudan, have crossed into Israel across a once-porous border with Egypt since 2006, Israeli authorities say.
Many say they want asylum and safe haven.
"We are here today to request basic human rights. We are refugees. We don't need to be arrested. We don't need to be detained. We don't need to be in prison," said Germai Asmaro, one of the migrants protesting on Monday.
Prime Minister Benjamin Netanyahu has said he views the presence of many of the Africans as a threat to Israel's Jewish social fabric.
"Demonstrations won't help them," Netanyahu told lawmakers of his right-wing Likud party on Monday. "These aren't refugees, who we treat according to international norms. These are illegal infiltrators seeking work."
UNHCR CRITICISM
An Israeli border fence has cut off the African influx from Egypt since 2012, but migrants who have already crossed can be sent to what the government describes as an open prison in Israel's southern desert.
On Sunday, more than 10,000 Africans demonstrated outside Tel Aviv city hall on Sunday on behalf of what human rights groups said are more than 300 migrants arrested since the detention law went into effect.
Dozens more have been summoned for detention, among them men with wives and children, rights activists and the United Nations High Commission on Refugees (UNHCR) said.
Detainees can leave the detention centre, but must report back three times a day, including at nightfall, and may be held without a time limit pending repatriation or resolution of their asylum requests.
"Placing asylum-seekers in duress that may force them to opt to return without having examined their asylum claims could amount to a violation" of international refugee conventions, Walpurga Englbrecht, the UNHCR representative in Israel, said in a statement on Sunday.
Englbrecht criticised Israel's official description of migrants as "infiltrators", saying most were refugees or deserved international protection. Israel's newest detention facility "would appear to operate as a detention centre from where there is no release", she said.
Israeli Interior Minister Gideon Saar rejected her comments, telling Israel Army Radio on Monday the vast majority of migrants had come in search of jobs, not asylum.
"But Israel isn't their home and we will make efforts to ensure it won't become a state of infiltrators," he said.
Netanyahu said Israel would continue encouraging migrants to leave or find countries to accept them. He said 2,600 left in 2013 and "this year we shall remove more of them."
Hotline for Migrant Workers, an organisation that advocates for the Africans, accuses Israel of pressuring detainees to accept payouts and leave the country. (Editing by Jeffrey Heller, Angus MacSwan and Crispian Balmer)
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