"Harassment is the new normal for Indian High Commission personnel in Islamabad. The High Commissioner's car was recently stopped by Pakistani agencies in the middle of a busy road to prevent him from attending an event," a source said.
Noting that the Pakistan High Commission has brought to the Ministry of External Affair's notice some incidents of alleged harassment over the last few days, sources said these will no doubt be investigated.
"Aggressive surveillance, violation of physical space and tailing of officers in close and dangerous proximity is a perennial issue. Agency personnel keep shooting videos of the officers thrusting phones on their faces.
"Obscene phone calls and messages are constantly received on phones. In view of such an atmosphere of intimidation, most families have returned to India and children have been withdrawn from schools," the source said.
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However, Indian diplomats chose to tackle this matter with quiet and persistent diplomacy rather than by airing issues in the media, the source said.
The strong reaction came after Pakistani news paper 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 the external affairs ministry in Delhi, a diplomatic source was quoted as saying by the Dawn.
"We would like to continue the fine tradition of allowing diplomats to do their jobs," the source said.
Sources 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.
"India's residential complex in Islamabad was raided by Pakistan agencies who expelled all Pakistani service providers and later disconnected power and water supply.