Error :SyntaxError: 'break' outside loop

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python 2.7.5 opencv

after Run this code , i got :SyntaxError: 'break' outside loop

what is problem???

import cv2
import numpy as np

cap = cv2.VideoCapture("C:\Users\Zohreh\Desktop\Abdomen.MST")

while (1):
 _, frame = cap.read()
hsv = cv2.cvtColor(frame, cv2.COLOR_BGR2HSV)

lower_blue = np.array([110,50,50])
upper_blue = np.array([130,255,255])

mask = cv2.inRange(hsv, lower_blue, upper_blue)
res = cv2.bitwise_and(frame,frame, mask= mask)

cv2.imshow("frame",frame)
cv2.imshow("mask",mask)
cv2.imshow("res",res)


k = cv2.waitkey(5) & 0xFF
if k == 27:

 break

cv2.destroyWindow()