Schlumberger is an oil-field services provider. The withdrawal includes "about 20 mid-level and senior managers," Bloomberg says.
Today's situation map from the Ukrainian National Security and Defense Council:
A pro-Kyiv Luhansk regional administrator says shelling "by separatists" in the city of Popasna has resulted in an unspecified number of casualties, and has destroyed buildings and a bridge to the city, our Ukrainian Service reports.
Ukrainian prosecutors say they have opened a criminal investigation against a Russian law-enforcement agency for allegedly supporting separatist and "terrorist" groups in eastern Ukraine.
The announcement on September 30 comes one day after Russia accused top Ukrainian political and military leaders as well as nationalist organizations of committing "genocide" against Russian-speaking people in eastern Ukraine.
The Ukrainian prosecutor-general said it has opened a criminal investigation against officials of Russia's Investigative Committee, the body investigating the alleged "genocide" by Ukrainian officials.
Ukrainian forces and pro-Russian separatists have been fighting for five months in eastern Ukraine, leaving at least 3,000 people dead and causing hundreds of thousands to flee their homes.
Kyiv and Western countries accused Russia of supporting the rebels and sending troops and hardware, charges that Moscow denies.
A September 5 cease-fire has ended most hostilities.
Based on reporting by Reuters and UNIAN
Reuters flashes:
RUSSIAN ENERGY MINISTER REITERATES KIEV HAS TO REDEEM PART OF DEBT BEFORE GAZPROM RESTARTS GAS FLOWS TO UKRAINE
RUSSIAN ENERGY MINISTER NOVAK SAYS HOPES TO RESOLVE DISPUTE OVER GAS DEBT TIMETABLE WITH UKRAINE THIS WEEK