Patna: RJD chief Lalu Prasad returned to Patna on Monday after 13 days of treatment at the Asian Heart Institute in Mumbai, but he will fly back to that city after two weeks.

Lalu returned to Patna along with confidant Bhola Yadav, eldest daughter Misa Bharti and her husband Shailesh Kumar.

Lalu has been advised complete bed rest before he goes through a surgery for fistula.

He was undergoing treatment at Rajendra Institute of Medical Sciences (RIMS) in Ranchi, but had applied for provisional bail for better treatment. The Jharkhand High Court granted him the provisional bail on medical ground.

RJD MLAs welcomed him with flowers and slogans of "Lalu Yadav zindabad" at Patna airport at 2.10pm.

Lalu, however, did not speak to the media at the airport. He just raised his hand in the air to greet the people who had gathered.

The MLAs who had gone to welcome him included Suday Yadav, Alok Mehta, and Rekha Paswan.

Lalu came out from the airport in a wheelchair and was taken to his 10 Circular Road residence where his better half Rabri Devi was waiting for him.

Lalu is suffering from diabetes, hypertension, chronic kidney ailments, fistula, and has had a heart valve replaced in Mumbai.

In Mumbai, Lalu was under the observation of a team led by Dr Ramakanta Panda, who had also operated upon Manmohan Singh when he was Prime Minister.

"The team of Dr Panda was treating the infection that was spreading in Lalu ji's body," a member of Lalu's family told The Telegraph. "As per the doctor, the root cause of the infection is fistula and for that an operation has to be done urgently. However, Laluji's haemoglobin percentage is less and even blood sugar is continuously fluctuating so the surgery cannot be carried out. Once the haemoglobin reaches satisfactory levels and blood sugar is under control he will go through the surgery."

Lalu has been advised not to eat non-vegetarian and to stick to the diet chart given by Asian Heart Institute which includes green vegetables and no spicy food.

After the operation, the doctors will analyse the condition of Lalu's kidney. The family member said earlier it was planned that Lalu would be taken to Banglaore for kidney treatment at BGS Global Hospital.

However, it has been decided that the kidney treatment will also be done at the Mumbai hospital.

"Dr Panda has said that the hospital has all the latest equipment related to kidney operation so there was no need to visit any other hospital," the family member said.