He said this in a telephone conversation with Lviv Mayor Andrii Sadovyi, Censor.NET informs citing the press office of the head of state.
"The waste should be cleaned up, not used for making big-league politics," Poroshenko said.
According to him, the security of one of the largest cities of Ukraine and its residents is at stake. According to the president, this is the issue that raises the greatest concern.
The president instructed the relevant agencies to deal with the causes of the tragedy and promised full assistance to Lviv by the central authorities in solving the existing problem.
Earlier, Lviv Mayor Andrii Sadovyi requested President Petro Poroshenko and Prime Minister Volodymyr Hroisman to declare Lviv and its nearby villages of Malekhiv and Hrybovychi an emergency area with serious ecological consequences due to the accident at the waste dump.
Earlier, a large-scale fire broke out on Hrybovytske dump site in the vicinity of Lviv on May 30. A waste pile slid and swamped three firefighters and presumably one member of a utility provider after the fire was eliminated and the firefighters were gathering the equipment and examining the site. The body of the third victim in the waste pile slide on the landfill located on the outskirts of Lviv was found late at night on May 31. A mourning for the victims of fire at the dump site was declared in Lviv June 1.