One remained until 9:18 AM and was shortly joined by a second one (pics 3, 4), the same occurred within 2 min around 9:23 (pic 5), and one appeared at 9:29 (pic 6), 9:34 (pic 7), two at 9:45 (pics 8...10), one again at 10:24...28 (pics 11, 12), and 10:45 (pic 13).
For notes on the situation see my obs of a Eurasian Collared-Dove on June 11, 2014, obs # 4504884.