French Prime Minister Gabriel Attal on Thursday announced measures to crack down on teenage violence in and around schools, as the government seeks to reclaim ground on security from the far-right two months ahead of European elections.

Attal revealed his plan hours before a man stabbed two young girls aged 6 and 11 outside their school in the east of the country, further underlining concerns of security at educational establishments. Their wounds were not deemed serious.

France has in recent weeks been shaken by a series of attacks on schoolchildren by their peers, in particularly the fatal beating earlier this month of Shemseddine, 15, outside Paris.

The issue has come to a head with the far-right National Rally (RN) accusing Attal of not doing enough on security as the anti-immigration party soars ahead of the government coalition in polls for the June 9 election.

Speaking in Viry-Chatillon, the town where Shemseddine was killed, Attal condemned the "addiction of some of our adolescents to violence", calling for "a real surge of authority... to curb violence".

"There are twice as many adolescents involved in assault cases, four times more in drug trafficking, and seven times more in armed robberies than in the general population," he said, also noting increased "Islamist" influences.

Measures will include expanding compulsory school attendance to all the days of the week from 8:00 am to 6:00 pm for children of college age.