Contradictions emerge in accounts of Pakistan raid

Pakistani police say up to 12 militants were involved in the 18-hour attack on a naval base in Pakistan's largest city.
Tuesday's police account contradicts those by the government and the navy, which earlier said there were six assailants. The discrepancy adds to the questions surrounding Sunday's brazen raid by Islamist militants on the base in the port city of Karachi.
The Taliban said the attack was to avenge Osama bin Laden's killing.
The police account is part of an initial case report into the assault. Such reports are a formal step in any police investigation in Pakistan.
Local police chief Shahrukh Khan says the report was written after consultation with a navy officer.
The navy declined to comment.