Rumors of mass deportations kicked off brawl in Lesbos island camp.
Rights watchdog says minors being held illegally without basic care.
Two days after the Greek parliament passed a package of budget cuts and tax hikes, Eurozone finance ministers decided to release a bailout loan for the country.
Greek authorities began on Monday to relocate 8,400 migrants who have been stranded in a makeshift camp in Idomeni on the Greek-Macedonian border.
The move comes ahead of Eurozone finance ministers' meeting.
Comes day before finance ministers will discuss int'l bailout funds.
Trade unions accuse the government of damaging Greece's social security system.
Several injured at a detention center on the Greek island of Lesbos.
Sinking may be one of the worst migrant tragedies over the last year.
Afghan and Syrian groups entered into a three-hour brawl.
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