IMD officials said that due to the
occurrence of mist and high concentration of pollutants, the visibility levels at Safdarjung and Palam decreased to 1,500 metres at 8:30 am
from 2,500 metres at 5:30 pm on Thursday.
According to the Intelligence Bureau(IB) following the arrest of the four terrorists,
search operations were conducted in which the police seized a sketch of the Palam airbase
and also a letter written by the DSP to one of the arrested terrorists.