■ Canada
Siblings affect orientation
The last male child in a family of many boys is likely to be gay, Canadian researchers found in a study published on Monday in the US Proceedings of the National Academy of Sciences online journal. The study, led by Anthony Bogaert of Brock University, found that "the most consistent bio-demographic correlate of sexual orientation in men is the number of older brothers [one has]" and not social influences. "Only biological older brothers, and not any other sibling characteristic, including non-biological older brothers, predicted men's sexual orientation," he said.
■ Brazil
Police foil prison attack bid
Police killed 13 people in Sao Paulo suspected of preparing attacks against prison warders in a new eruption of violence involving criminal gangs, security officials said on Monday. The deaths came in police operations in four Sao Paulo suburbs after officers received information about imminent attacks from monitoring telephone conversations, said a spokesman for the Sao Paulo state security department. The spokesman said police believed attacks were to be carried out Sunday night on jail warders at prisons in the Sao Paulo suburbs.
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