Sixteen-year-old Muhammad Tariq of North Waziristan had joined hundreds of tribesmen in the rally against drone strikes in the Pakistani capital on Friday. The protesters had called for an immediate end to the strikes, saying they killed many civilians, reported Rediff.com.
Tariq was killed with his cousin Waheed, 12, in a US drone strike on Monday night near Mirali, a key town in the restive North Waziristan tribal agency, said Karim Khan, who is leading a campaign against the missile attacks.
Khan, who belongs to Mirali, had lost his son in a drone attack last year.
He filed a case against the former CIA station chief and several top US officials in a police station in Islamabad for what he said was the murder of innocent tribesmen in drone strikes.
At least four people were killed in Monday nights drone strike on a house and a vehicle, according to local media reports.
It was the fourth strike in Waziristan in five days.
On Sunday, US spy planes fired missiles at a house in North Waziristan and killed at least six people.