A massive landslide has blocked the Kali Gandaki river in Nepal's Myagdi district since Sunday morning.According to the ministry of home affairs, the landslide has blocked the river near Baisari village, burying a few dozen houses, Xinhua news agency reported.However, no casualty has been reported so far. The ministry of science, technology and environment has immediately declared "high alert" in the settlements along the banks of Kali Gandaki river.Residents living in the downstream of the river from districts like Syangja, Parbat, Myagdi, Baglung, Gulmi, Palpa, Nawalparasi have been asked to remain alert.The home ministry also said that a chopper with six rescue personnel has been mobilised in Myagdi.