A middle age male known case of ESKD secondary to bilateral shrunken kidneys on maintenance hemodialysis for 1 year, Live related transplant was done , post operatively his urine output was 50ml/min, n his blood pressure was high 180/110, for that he was given i/v labetalol in fusion and also his potassium was high (6.4), without any ECG changes. What will be the possibilities? Hyperacute rejection?