A 12-year-old boy has attacked and injured several fellow pupils with a knife at a school in Portugal. A 12-year-old girl was taken to hospital with serious injuries but is not in critical condition, the newspaper Público and other media reported on Tuesday, citing the authorities. The attack occurred in Azambuja, around 50 kilometres north-east of the capital Lisbon. The background to the incident remains unclear for now. The attacker returned to school after the lunch break and suddenly, apparently randomly, attacked several children with a knife, Público quoted Azambuja Mayor Silvino Lúcio …