Five women were arrested overnight in the city of Bezier in connexion with a possible terror plot, police said Sunday.
The attack took place at the Sacred Heart of Jesus Cathedral in Makassar, the capital of South Sulawesi province.
There was no immediate claim of responsibility for Monday's massacres, though extremists belonging to the Islamic State in the Greater Sahara group are known to be active in the region.
The girls were abducted from their boarding school by gunmen last Friday.
"We are there because we have a shared destiny with the Sahel. If the Sahel falls into the hands of terrorism, Africa will gradually fall into the hands of Islamic terrorists and Europe will live the consequences," said Macron.
The move comes following the events at the Capitol, after which several on and off-duty police officers and active military personnel were arrested for participating in the siege.
The 1988 bombing of a New-York-bound Pan Am jet that exploded over the Scottish town of Lockerbie killed 270 people.
The terrorism trial of 14 people connected to the January 2015 Islamist attacks in Paris ended with one life sentence, two 30-year jail terms, and all convicted of involvement.
Intelligence agencies were too focused on the threat posed by Islamist extremism at the expense of other dangers including white supremacism, the report says.
Walid Abdulrahman Abou Zayed was extradited to France on Friday by Norway, where he had settled in 1991.
Libyan intelligence officer Abdel Basset al-Megrahi was jailed for life in 2001 for the 1988 murder of the 270 passengers and crew of Pan Am flight 103 over the Scottish town of Lockervie. He died in 2012.