"It is for the last one week that the duo are roaming in the fringes of the reserve and have killed a few cattle there as well. The two aged tigers seem to have been driven out by their counterparts in a territorial fight in the reserve," said B K Singh, Karnataka Principal Chief Conservator of Forest (PCCF).
The staff has been alerted which is keeping a close watch on their movement and making efforts to drive them back to the reserve, he said.
Two 17-month-old cubs were found dead early this month in Ranthambore, allegedly poisoned by villagers apparently upset over the killing of their livestock by the tigers.
Though straying of animals was a natural phenomenon, at times lack of enough space in their habitat due to over-population becomes the main reason for such action, he said.
"This is the second incident of straying of tigers this year, with the previous one being in February when a big cat was chased back to the sanctuary."