The MHB Colony police arrested one person and detained two others on Monday for allegedly attacking a lawyer, his associate and clients with swords and knives, when they went to survey land in Dahisar west on Sunday.

Police said lawyer Satyadev Joshi, who is in a critical condition, had gone to survey the land near Kandarpada in Dahisar West with his associate Ankit Tandon and clients Divyesh Desai, his father Rajendra, his partner Taukir Khan and Khan’s two sons. Police said over 30 men came and threatened to kill them if they did not leave. They claimed the land belonged to one Arun Upadhyay and Mukesh Bhatia.