Amnesty International has called on the Lebanese authorities to "halt the unlawful deportations of Syrian refugees", fearing that they would be "tortured or persecuted" by the Syrian government upon their return to their war-torn country.
Monday's call by the NGO comes after Lebanese authorities deported about 50 Syrians to their country in April, amid rising anti-Syrian sentiment, exacerbated by the economic crisis.
Aya Majzoub, Amnesty International's deputy director for the Middle East and North Africa, said in a statement obtained by AFP: "No refugee should be returned to a place where his life is at risk."
Dozens of refugees who entered Lebanon illegally or who hold expired residency papers have been expelled after raids on their homes by the Lebanese army.
According to the same agency, hundreds of thousands of Syrians fled to Lebanon after the outbreak of the revolution in 2011 and the suppression of protests against the regime.
Two million refugees
According to the authorities, there are about two million Syrian refugees in Lebanon, about 830,<> of whom are registered with the United Nations.
Since the Syrian regime regained control of most of Syria's territory, some host countries have sought to expel refugees, citing a relative end to the armed conflict.
Human rights groups say some refugees have been persecuted, rejecting the notion that it is safe for them to return.
Lebanon has made several attempts described as voluntary repatriation of Syrian citizens to their country, but human rights organizations consider them coercive.