Congress vice-president Rahul Gandhi may skip RJD chief Lalu Prasad's rally in Patna on Sunday as he is travelling to Norway.

"On the invitation of the Norwegian Ministry of Foreign Affairs, will be travelling to Oslo for a few days," Gandhi tweeted today. "Looking forward to meeting and exchanging ideas with political and business leaders and research institutions," he said.

Lalu's Rashtriya Janata Dal is organising a "BJP Bhagao, Desh Bachao" rally on Sunday in Patna's Gandhi Maidan. It is the RJD's major show of strength after the party was ousted from the Bihar government with the JD-U moving out of the Grand Alliance and joining back the NDA.

But the rally, pitched as a joint Opposition show, is already under cloud after a series of leaders announced they will not be attending it. Congress president Sonia Gandhi, Bahujan Samaj Party chief Mayawati, and the Left have decided to skip.

The Congress, however, has said it supports the rally and may send Leader of Opposition in Rajya Sabha Ghulam Nabi Azad as its representative. Rahul Gandhi had earlier indicated that he might be present at the Patna rally as Lalu has been a long-time friend and supporter of the Gandhi's.

But analysts said the presence of the Gandhis at the rally, however, may affect Congress prospects as Lalu and his son are embroiled in multiple cases of corruption.