The adviser to the mayor of Mariupol warned on Saturday that the Russian troops are preparing to close the city by April 18 and will “filter” all the men for forced service, work or “isolation”. “The occupiers say that on Monday they will not only finally close all entrances and exits to the city for everyone, but will impose a curfew in all neighborhoods for a week. During this period, 100% of the remaining male population will city ​​will be “filtered,” Petro Andriushenko said in a Telegram translation translated by the Ukrainian news agency Ukrayinska Pravda. RUSSIA INVASES UKRAINE: LIVE UPDATES “Some people will mobilize in the Russian occupation corps, some will be forcibly deployed to clear the rubble and those who are considered unreliable will be isolated,” he added, noting that those deported would be transferred to a camp in Novoazovsk. Mariupol Mayor Vadym Boychenko said last week that some 31,000 people had been forcibly deported and sent to Russian “filtering camps” in Novoazovsk – a Ukrainian border town 35 miles from Mariupol and just 9 miles from the Russian border. Novoazovsk is located in the Donetsk People’s Republic – a breakaway region on the Russian-backed eastern front of Ukraine that has been involved in an armed conflict with the Ukrainian army since 2014. UKRAINE: MORE THAN 900 SECURITY BODIES FOUND IN KIEV REGION, POLICE REPORT Defense officials have warned that Russia plans to use all available force in the Donbass region of eastern Ukraine after failing to occupy the capital, Kiev, after months of fighting. All Russian ground forces are believed to be in eastern Ukraine, and Andriushchenko said Russian troops had already begun a “filtering process” in the area. The Mariupol adviser said the men were taken to filter camps where they were interrogated, their mobile devices searched and subjected to a physical examination. ZELENSKYY ABOUT REPEATING WEAPONS REQUESTS: “IT’S GREEK DAY” Andriushchenko allegedly claimed that five to 10 percent of the men did not “pass” the filtering process and then were sent to other areas in the Donetsk region, but it is unknown what will happen to these people next. Ukrainian officials are sounding the alarm that residents of eastern Ukraine have also been forcibly deported to Russia. Ukraine’s human rights ombudswoman Lyudmyla Denisova – who is investigating allegations of human rights abuses – said she had received reports from concerned Russians that some 400 Ukrainians were being held in a fenced camp near the city of Penza. CLICK HERE TO RECEIVE THE FOX NEWS APPLICATION The camp, believed to house more than 145 children, is a former Russian military base 600 miles off the Ukrainian border and is said to have been used as an ammunition dump for Soviet chemical bombs after World War II.