The condition of Bollywood superstar Amitabh Bachchan [Images], who was admitted to the Leelavati Hospital in suburban Bandra in Mumbai following abdominal pain, is stable and would undergo a few tests on Tuesday, hospital sources said.

The 63-year-old actor has been kept under observation, and will be resting in the hospital, they said, adding that the test results would be available in the evening.

Bachchan was first admitted to Escorts hospital in the Capital on Monday from where he was flown in to Mumbai later in the  evening.

Leading cardiologist and Director of Escorts Naresh Trehan had said that Bachchan's illness was "nothing serious and just a normal irritation in the intestine".

"He came with complains of pain in the abdomen for which we have investigated him. Nothing serious has been found and he is now being discharged," Trehan had told reporters.

He said doctors conducted several tests, including those of the blood, ultrasound treatment, X Ray and CT Scan.

Asked whether it was a case of food poisoning, he said, "It was something like that."

Bachchan and his family members had come to Delhi in the small hours of the day after attending a function to commemorate his litterateur father late Harivanshrai Bachchan's birth anniversary.

Meanwhile, Samajwadi Party leader Amar Singh and Bachchan's son Abhishek visited him at Leelavati Hospital on Tuesday morning.