MIRANSHAH (Reuters) - A second drone strike in two days killed five militants in North Waziristan on Thursday, intelligence officials said, further marking the resumption of the US campaign paused for almost two months.

The suspected US drone fired two missiles at two cars in the Dogga area of North Waziristan tribal region, killing five.

“The missiles hit two cars that were heading towards the border. Several foreigners were in the cars, but we have no information on their nationalities yet,” an intelligence source told Reuters. The source said there might be more casualties.

The strike comes two days after a similar attack killed four militants in North Waziristan, marking the resumption of the unacknowledged US drone campaign, paused after a November 26 NATO cross-border attack killed 24 Pakistani troops. The last drone strike before Tuesday’s was on November 17.