Several energy companies with ties to Houston, including Transocean Ltd. and Diamond Offshore Drilling Inc. on Monday said they were shutting down their Egyptian operations as protesters against President Hosni Mubarakâ¿¿s regime take to the streets for a sixth day, according to news reports. Bill Mintz, a spokesman for Apache Corp. (NYSE: APA) told the Houston Business Journal that its Egypt office in Cairo was closed due to problems employees were having navigating around the city, but that its operations in West Egypt are not impacted by the crisis. "All our people are safe," Mintz said. A spokeswoman for Schlumberger Inc. (NYSE: SLB) did not offer any specific comment when asked Tuesday if the closed any offices or curtailed operations in the troubled region. "All our staff are safe," the spokeswoman said. "We have relocated some expatriates and their families. Our main concern is for the well-being of all employees in Egypt." Meanwhile, Transocean (NYSE: RIG) and Diamond Offshore (NYSE: DO) had evacuated the families of its expatriate workers from Egypt due to civil unrest in the country, according to Reuters. Transocean employs about 1,000 people in the area, while Diamond Offshore has about 12. Other companies including BP Plc, Royal Dutch Shell Plc, BG Group Plc and Statoil ASA also began relocating staff, according to reports. The Wall Street Journal reported that U.S. markets were focusing more on positive news from U.S. companies posting earnings, including Exxon Mobil Corp. (NYSE: XOM), as well as the fact that the Suez Canal was still open. In early afternoon trading Monday, the Dow Jones Industrial Average was up about 49 points to 11,872. In a note to investors Monday morning, Houston-based Tudor Pickering Holt & Co. LLC said that oil prices are still pushing higher, on fears that "unrest in Egypt (chief US ally in the Arab region) has the potential to spill over onto the Arab Peninsula ...that will get the markets undivided attention."