Emergency services rushed to the U.S. Embassy in Malaysia on Monday after an envelope containing a powder that officials feared could be anthrax was sent to the consulate. Three embassy staff members who had been exposed to the yellowish substance were temporarily quarantined as a precaution, but a medical checkup indicated none of them were in any danger, said district police official Aman Hussain. The powder was being sent for laboratory tests to determine whether it might contain anthrax spores or other toxins, Aman told reporters.