I think this is a separate attack from the September 19th strike...it was near Dara Zinda, it's close to Datta Khel, which is controlled by Hafiz Gul Bahadur.
From the AFP and Dawn.com (September 20, 2010):
MIRAM SHAH: Four militants were killed in a US drone strike in Pakistan's northwestern tribal belt near the Afghan border on Monday, security officials said.
A drone fired three missiles at Darazinda village, 40 kilometres northeast of Miramshah, the main town in North Waziristan region, they said.
“The drone fired one missile on two militants riding on a motorbike and when two of their colleagues rushed towards them, two more missiles were fired,” a security official told AFP.
“All four militants were killed.”
Two other security officials confirmed the casualties, saying the missiles were fired by the pilotless aircraft.