New Delhi, Aug 2 - A section of the road on the controversial Bus Rapid Transit (BRT) corridor here caved in early Sunday leaving critically injured two bikers who fell into a seven-foot pothole, officials said.

The incident took place around 2 a.m. when the road-section subsided near Defence Colony as the mud below the road seemingly turned soft apparently due to water seepage.

Amit Kumar, 23, and Santosh Kumar, 29, suffered injuries as their bike went inside the seven-foot-long crater. Both of them are working with a courier agency in Delhi.

'They were rushed to AIIMS trauma centre and are undergoing treatment,' a police officer said.

Delhi Chief Minister Sheila Dikshit said experts will look into the matter.

'We will inquire the matter and experts will look into the whole incident. But such incidents don't mean that we stop work on other BRT corridors,' Dikshit told reporters.

The authorities have repaired the road and truck loads of mud were filled in the hole to prevent any such incident in future.

The BRT project manager, R.P. Singh said: 'We have repaired the road and are checking the reason (for the accident). The road is 50 years old and there might be a possibility of water leakage from an underground sewer or water pipeline that may have softened the stretch.

'There is also a possibility that rats might have dug the land below and subsequently rain water washed away the mud. We are checking the reasons and then only anything could be said,' he contended.