It looks like there's been a major terrorist attack in Russia:

(CNN) -- Two passenger planes have crashed in Russia Tuesday night, Russian officials and a news organization 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 reported.
A second plane went down about 160 kilometers (100 miles) from Rostov-on-Don, in southern Russia, government-run news agency Ria Novosti reported.
A ministry spokeswoman said she could only confirm that the second plane had been lost to radar.

The first plane disappeared from radar at 10:56 p.m. (2:56 p.m. ET), a ministry spokeswoman said.

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

The second plane, a Tupolev-154, disappeared at 11 p.m. (3 p.m. ET) after having taken off from the same airport en route to Sochi in southern Russia, Ria Novosti reported.

And, so far as we know, these planes did not crash into eachother. Given the time differentials between the crashes and the different areas in which they hit the ground, I think it's safe to say that they didn't collide in mid-air. Beyond the very unlikely possibility of two mechanical failures in such proximity in such a short time, Jihad seems to be the likely cause of the crash.