SHARES of offshore and marine groups Keppel Corporation and Sembcorp Marine (SembMarine) extended their losses from morning trade, falling more than 3 per cent by midday. Keppel's stock lost 25 Singapore cents to trade at S$7.22 on a volume of 6.9 million, while SembMarine shares slid six Singapore cents to S$1.88 on a volume of 6.7 million. Both counters continued to be among the actives. The sliding share prices follow Keppel Offshore and Marine's (O&M) disclosure on Saturday that it will pay US$422 million in fines as part of a global resolution for a corruption probe across three jurisdictions in Singapore, Brazil and the US. This is a fresh blow to the beleaguered O&M sector, which is just about to turn a corner with oil prices stabilising in a healthier band for several months now. Keppel O&M's revelation will put SembMarine under the spotlight. Sete Brasil was behind about US$10 billion of rig-building contracts that were awarded to Keppel O&M and SembMarine.