Belgium lowered its Terror Threat l lel yeststday, but the government said theres still a serious risk. The manhunt for two suspects coinued near brussels and sewhere. Nbcs keir simmons has more. Salah was seen with another suspect, mohammed abrini, at a gas station, prior to the paris attacks. Elements of the investigation must remain confidential, the belgian Prime Minister told his nation today, to make sure we can stop this threat. But in brussels the government unexpectedly lowered the threat level this afternoon. Another attack no longer considered imminent. But still a serious risk. Earlier the citys grand mosque. Cordoned off after receiving envelopes of white powder. A frightening few hours as 11 people underwent emergency treatment. Tests later showed the powder was flour. Separately two men were arrested at a mosque in germany. Accused of planning still more attacks. Well over a thousand raids have been carried out across europe, weapons and money seized. The mastermind kill