"The probe conducted so far indicated no terror angle into the incident at Latur," a senior ATS official said here.
At least 19 were injured, four of them seriously, in the explosion inside a bus at Nalegav village at Chakur taluka in Latur district last evening.
Police suspect the explosion might have occurred due to the overheating of engine.
Teams of Maharashtra ATS and forensic experts from Pune rushed to the spot and collected the samples. There are no signs of RDX presence, the officer added.