Former external affairs minister K Natwar Singh was on Tuesday expelled by the Bahujan Samaj Party for indulging in anti-party activities and was accused of indiscipline and lack of faith in the Bahujan samaj movement, four months after he joined Uttar Pradesh's [Images] ruling party.

Announcing the expulsion, BSP national general secretary Satish Chandra Misra said it was found that Singh had joined the BSP after leaving Congress in August with some "ulterior motives."

Singh, who was expelled from the Congress, had started indulging in acts of indiscipline after finding that his plans did not fructify, Mishra said.

"Natwar Singh who had been active in politics and in Congress for a long time was told at the time of joining that BSP was not like any other party," Misra said adding that he was  told that party attached great importance to discipline as well as faith and dedication towards the BSP movement.

It was thought that since Singh was a senior leader he would rise above personal ambitions and interests and work for the movement but it was found to be otherwise, Misra said.

"At the time of the Rajya Sabha elections, he had expressed his desire to enter into the fray on BSP ticket but as there were several dedicated party workers who should have

been given priority over Singh, he was told that neither a capitalist nor an opportunist would be fielded," Misra said.

The BSP general secretary said that as soon as Singh understood that the ulterior motives for which he had joined the BSP would not be fulfilled he started indulging indiscipline.