The birth of Beyonce and Jay-Z’s daughter at Lenox Hill Hospital in New York has caused much stress to a dad who says the couple's ultra-tight security stopped him from visiting his two prematurely born twin daughters in the neonatal intensive care unit at the hospital.

Neil Coulon, as per daily routine, was visiting the newborn twin daughters who were on sixth floor in the hospital on the night of Jan. 6.

Coulon told New York Daily News that Beyonce's security guards, wearing headsets, repeatedly stopped him from visiting the sixth floor neonatal intensive care unit.

“Three times they stopped me from entering or exiting the NICU (Neo-natal Intensive Care Unit) and it happened once on Friday — just because they wanted to use the hallway,” Coulon said.

These are children with problems in intensive care and you're just going to take over the hospital like you own it? All I want is an apology, Coulon said.

According to The New York Times, the area outside the neonatal unit had been transformed: partitions had been put up, the windows of maternity ward were covered, the hospital staff were told to hand in their mobile phones and even the security cameras were covered with tape.

Another father who faced problems due to the couple’s high security was Edgar Ramirez, whose wife and newborn daughter were moved to a sixth floor room.

“I couldn’t see her for three hours,” Ramirez told New York Daily News.

“The security was just ridiculous. I felt like I was in a prison. There is way too much security,” he said, claiming he was detained in a waiting room.

Meanwhile, hospital spokeswoman Anne Silverman said the hospital had not received any formal complaint about security measures.

“We have been in control of the security detail, and we remain in control of it. The security plan was designed not to limit access to patient care areas,” Silverman said.

“We take patient satisfaction very seriously. This is the first time I’m hearing about it,” she added.

Earlier reports suggested that the R&B singer and husband Jay-Z paid about $1.3 million to seal an entire hospital floor, but hospital officials denied the reports.