(CNN) -- Two planes have disappeared from radar nearly simultaneously in separate incidents in Russia Tuesday night, and one was confirmed to have crashed, the Russian Emergency Ministry said.

A passenger jet carrying 34 passengers and eight crew members in the Tula region crashed about 160 kilometers (100 miles) south of Moscow, the ministry said.

Witnesses reported seeing the plane explode before it crashed, the Russian news agency Interfax reported.

A ministry spokeswoman said the wreckage was located ablaze and that no one survived.

Government-run news agency Ria Novosti reported that the plane's wreckage was in two separate locations.

The second plane, carrying 44 passengers and eight crew members, apparently went down about 160 kilometers (100 miles) from Rostov-on-Don, in southern Russia, Ria Novosti reported.

The spokeswoman said she could confirm only that the second plane had been lost to radar.

Ria Novosti said Russian President Vladimir Putin had been notified of the situation and had ordered security services to launch an immediate investigation.

The first plane disappeared from radar at 10:56 p.m. (2:56 p.m. ET), the news agency said.

The Tupolev-134 had taken off from Moscow's Domodedovo Airport and was en route to Volgograd, in southern Russia.

The spokeswoman said the wreckage was located ablaze and that no one survived.

The second plane, a Tupolev-154, disappeared from radar at 10:59 p.m. (2:59 p.m. ET) after having taken off from the same airport en route to Sochi, a tourist resort on the Black Sea in southern Russia, the ministry spokeswoman reported.

The Tupolev-154 is a standard medium-range airliner on domestic flights in Russia, according to aviation websites.