LONDON - BRITISH Prime Minister Gordon Brown voiced caution on Friday over a report that Britons of Pakistani origin could be among the militants in the Mumbai attacks.

'I would not want to be drawn into early conclusions about this,' he said, when asked by Sky News television about a report by an Indian television station.

'There is so much information still to be discovered and made available. I have heard what (Indian) Prime Minister (Manmohan) Singh has said and I'll talk to him about it this morning.

'But obviously when you have terrorists operating in one country they may be getting support from another country or coming from another country and it is very important that we strengthen the co-operation between India and Britain in dealing with these instances of terrorist attacks.'

The Indian premier said on Thursday that those behind coordinated attacks against Mumbai were based 'outside the country.' According to British online newspaper reports, the Indian television news channel NDTV had reported that 'British citizens of Pakistani origin' were among the attackers.

A Foreign Office spokesman said: 'We have seen the media reports but we are not aware of anything giving any credence to those reports at the moment.' Home Secretary Jacqui Smith said London has 'no knowledge' of any British links with the massacre.

'We will do anything we can to help Indian authorities through what is obviously a very difficult time,' she said. 'We will do what is necessary. At the moment the priority is to support the immediate needs.

'We will work with the Indians to see what we can learn from the events,' she added. -- AFP