Some 11,000 migrants have landed on the island since the start of the year. That is up on last years figure of 4,105 for the same period, Reuters news agency reports. However, it is still down on 2015 - the height of the migrant crisis.
Mr Salvini is currently awaiting trial in relation to blocking a rescue ship with more than 100 migrants on board from landing at Lampedusa in August 2019. Prosecutors in Sicily accuse the former interior minister of illegal detention, which could bring a jail term of up to 15 years.
A note on terminology: The BBC uses the term migrant to refer to all people on the move who have yet to complete the legal process of claiming asylum. This group includes people fleeing war-torn countries, who are likely to be granted refugee status, as well as people who are seeking jobs and better lives, who governments are likely to rule are economic migrants.