Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) was asked about the one who commits the deed of the people of Lut, and he said: The highest building in the town should be sought out, and he should be thrown down from it headfirst, then stones should be hurled after him.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحدود / 17024