Singh said he was in London when he was “summoned” back due to developments in the party.
“I was undergoing treatment in London but was summoned due to the developments here, now going back to complete my treatment,” he said here.
Singh said he would shortly leave for treatment in London and later Singapore.
“I would be back sometime in late March,” he said.
He leaves at a time when the Election Commission is set to deliver order on the symbol dispute in the party.
Singh has signed on a few documents the Mulayam camp has submitted to the poll panel to stake its claim over the ‘cycle’ symbol.
He was conspicuous by his absence in Election Commission on Friday when the Commission heard the two sides on the symbol issue.
PTI