Since March, Bukele has ordered the arrest of more than 50,000 suspected gang members, whom he calls terrorists.
The crackdown is one of his key policies and aims to reduce the murder rate in the Central American country to less than two per day.
Speaking at a graduation ceremony for military officers, Bukele said he would add more than 200 police officers to the 20,000 soldiers already patrolling the cities with orders to deal with gang members.
The goal is to “surround major cities and take out the terrorists hiding in the communities, without giving them the slightest chance to escape,” he said.
The latest escalation follows Congress’ support for a so-called state of emergency, first approved in March, which imposes strict restrictions on freedom of association, the right of defense and restrictions on telecommunications.
According to government data, the number of homicides attributed to gangs has fallen dramatically as a result of the crackdown, with more than 200 days of no gang-related deaths so far this year.
Bukele launched his controversial act shortly after 76 Salvadorans were killed in one weekend in March last year.
Human rights have denounced the policy, as many of those arrested have no criminal record.