A team of experts landed here from Hyderabad on Sunday, May 23 evening.
The DNA test would help in identification of bodies charred beyond recognition in Saturday's Air India Express plane crash.
In the country's worst air disaster in a decade, 158 people died when the Mangalore-bound Boeing 737-800 flight from Dubai overshot the runway and burst into flames at the Bajpe airport here.
Eight persons survived miraculously in the accident.
Relatives of those killed have gathered at the Wenlock Hospital and are trying to identify their loved ones.
According to sources, sampling for DNA tests began at the hospital and results could take at least a week.