Sources in India also said that on February 16, the Indian High Commissioner met the Foreign Secretary of Pakistan to lodge a strong protest against multiple acts of hooliganism against Indian properties and personnel.
Amid allegations of intimidation and harassment of Indian and Pakistani diplomats and their families in recent weeks, the Pakistan High Commission circulated a video Tuesday, showing a diplomat's vehicle being blocked by a slow-moving auto in New Delhi.
According to the diplomatic sources, a total of around 500 to 600 Pakistanis including 104 officials and staffers at the high commission and their family members are now stationed in the Indian capital.
The Pak high commission alleged that the children were harassed and blocked by Indian authorities while on way to school. Indian diplomats posted in Islamabad, the Pakistani capital, alleged to Al Jazeera on Wednesday that they had been facing similar harassment for months.
Meanwhile, The Indian Express has learnt that the application of Indian High Commissioner to Pakistan, Ajay Bisaria, for membership of the Islamabad Club has been stalled by the Pakistan government since it wants membership of Delhi Gymkhana and Delhi Golf Club for its diplomats in New Delhi.
The Foreign Office said that "these [incidents] have escalated exponentially in the last few days".
Although India hasn't responded to the official communication from the Pakistan high commission, government sources said that the incident and the charges are getting investigated.
"When a protest was lodged following this incident, instead of ameliorating the situation, it was followed by further harassment and stoppage of the provision of gas to the residential complex and further threatening of staff working at the High Commission", reads the statement. Another Pakistani diplomat alleged to have had his vehicle tailed on Thursday evening.
Singh was summoned after Pakistani newspaper Dawn quoted Pakistani officials of accusing India of harassing its diplomats and their families in the country and threatened to pull out the families if the intimidation did not stop.
A demarche was made to the Indian High Commission in Islamabad and external affairs ministry in New Delhi in this regard.
Aggressive surveillance, violation of physical space and tailing of officers in close and risky proximity has been a perennial problem, the first person cited above said.