Imphal: Four NPP MLAs in Manipur who had resigned as ministers a week ago submitted a letter to Governor Najma Heptulla on Thursday, extending their support to the government headed by Chief Minister N Biren Singh. NPP chief Conrad Sangma, who arrived in Imphal in the morning from Delhi, said the party MLAs will also withdraw their resignation as senior BJP leader and Union Home Minister Amit Shah has assured to look into their issues.