BRIEF-Russia's MTS posts 33 pct rise in Q1 net profit By: Reuters: Company News May 19, 2016 at 08:00 AM EDT * Q1 net income at 14.5 billion roubles ($218.3 million), up 33.3 percent year-on-year; Read More >> Related Stocks: Mobile Telesystems Public Joint Stock CO Spectra Prods Inc