This is AP News Minute.
Federal officials are denying that a suspect is in custody in the Boston Marathon bombings. A law enforcement official had told several media outlets that a suspect was in custody. But the FBI and the U.S. attorney's office in Boston dispute that. The FBI says the letters that were sent to President Barack Obama and to Mississippi Senator Roger Wicker are related and both were postmarked more than a week ago in Memphis. The agency says the substance in both letters has tested positive in preliminary tests for poisonous ricin. It's the latest twist in the case of a north Texas prosecutor and his wife found shot to death in their home two months after an assistant prosecutor was gunned down. Authorities have now charged the wife of a former justice of the peace in the three killings. Kim Williams is being held on $1 million bond. And Britain is saying goodbye to former Prime Minister Margaret Thatcher. Dignitaries from around the world gathered at St. Paul's Cathedral in London and the public lined the streets to catch a glimpse of Thatcher's coffin. Nicole Grether, the Associated Press with AP News Minute.

这里是美联社新闻一分钟。
联邦官员否认波士顿马拉松赛爆炸嫌犯被拘捕的消息。 一名执法官员告诉几家媒体嫌犯已经被捕。 但联邦调查局和波士顿检察官办公室对此持有争议。 联邦调查局表示，寄给总统奥巴马和密西西比州议员罗杰・维克尔的有毒信件 一周前都在孟菲斯市盖过邮戳。 两封信件都被初步检测出蓖麻毒素。 一名助理检察员被枪杀，及两个月后一对德州北部检察官夫妇在家中被枪杀的案件出现转机。 一名前治安法官被起诉与这三起谋杀案有关。 重要线人金姆・威廉姆斯获得100万美元奖金。 举国人民和英国前首相玛格丽特・撒切尔告别。 全世界的政要权贵齐聚伦敦圣保罗大教堂。民众们聚集在道路两旁目送撒切尔夫人灵柩。 妮可・格雷特报道，这里是美联社新闻一分钟。