Rima Hassan, a French far-left member of the European Parliament, was arrested on Thursday over a comment she posted on X/Twitter last month about an attack on an Israeli airport in the 1970s, her fellow party member Jean-Luc Melenchon said.
Hassan and her lawyer did not immediately respond to requests for comment.
"The politics police has once again put Rima Hassan in custody in relation to a re-tweet from March. So there is no parliamentary immunity in France. Unbearable," wrote France Unbowed (LFI) leader Melenchon on X/Twitter.
'Showing support for terrorism'
Le Parisien and other French media reported authorities had arrested Hassan and detained her in custody because they suspected the post made on March 26 could be construed as showing support for terrorism.
The message was related to the 1972 attack by the Japanese Red Army, a far-left militant group, at Lod airport in Tel Aviv, which resulted in 26 deaths.
In her subsequently deleted post, Hassan had quoted on her X account a comment made by an individual convicted of the attack seeking to justify it due to what he said was the "oppression" of people in the Palestinian territories.