On July 21, Israel continued airstrikes against Lebanon while massing troops on the border and calling up five battalions of army reservists (3000 reserves) for a possible ground invasion. Between 300–500 Israeli soldiers backed by 30 tanks were already believed to be over the border.[94] Roughly 70 percent of Lebanese civilians living in south Lebanon fled north, and the Lebanese defense minister stated that in the event of an Israeli ground invasion that the Lebanese army would fight alongside Hezbollah. Hezbollah continued firing rockets at the Israeli town of Haifa injuring 20 Israelis while Israeli jets hit Shiite districts in Beirut's southern suburbs, the eastern Bekaa Valley and southern Lebanon around sunrise, killing 12 Lebanese.[95] German and Russian intelligence were reportedly seeking the release of the captured IDF soldiers.[96]