The NYPD has built a solid wall of blue as they stand in the pouring rain and honor Didarul Islam, watching a hearse carry his coffin down White Plains Road after his funeral.

His body is currently being transferred for a private internment with his family.

Slain NYPD Officer Didarul Islam's family were saluted by a sea of fellow cops after the fallen officer's funeral service in the Bronx.

Speaking on behalf of Didarul Islam's family, brother-in-law and fellow police officer Kamrul Hasan recalled how he and Officer Islam pushed each other to become better cops.

"Didarul Islam was not only my brother-in-law — he was my protector," Hasan said in his eulogy earlier in the funeral. "He was my best friend. He left behind everything."

The grieving cop also revealed Islam was recently told he was in line for a promotion at the 47th Precinct due to his excellent record of service.

Slain NYPD officer Didarul Islam's coffin was carried out of Parkchester Jame Masjid mosque for the start of the funeral procession.

"My husband was a man of faith, integrity and service," NYPD Officer Didarul Islam's widow said in a prepared statement read by another woman during the funeral.

"He came to this country with a dream to build a better life and he did, through hard work, kindness, a deep sense of responsibility and duty to his family and community."

"To our family, he was our world. To the city, he was a proud NYPD officer who served with compassion and integrity. He lived to help others and he gave his life protecting them.

"Though my heart is broken, I find comfort knowing that his sacrifice may have saved others in that lobby."

It's a stunning scene depicting the melting pot that is New York, as NYPD blue and at least one Jewish man joined hundreds — if not thousands — of Muslims praying in the streets.

Officer Islam was killed in a mass shooting at 345 Park Ave. in Midtown Manhattan, where 27-year-old Shane Devon Tamura opened fire, leaving four people dead.

PARKCHESTER, BRONX — Drops of rain begin to fall as the thousands of officers stand at attention in silence.

The procession carrying Didarul Islam's coffin begins. The sky is threatening to open up, but right now we only have drops. 

PARKCHESTER, BRONX — A man, apparently an NYPD officer considering he's wearing a white button-down shirt with the NYPD patch on the arm, was taken away on a stretcher around 1:30 p.m.

It was not immediately clear why he needed medical attention

People are setting up for the coffin to be taken to the hearse.

They are using Gleason Avenue, making a right on White Plains Road, where the hearse is parked.

"Officer Islam was not just a cop. He was a son of the city and another land," Deputy Inspector Muhammad J. Ashraf, the commanding officer of the NYPD's 47th Precinct, said at the slain officer's funeral.

"A proud immigrant from Bangladesh who came to this country full of hope and who chose to serve the city with honor."

"He wore the NYPD shield not just as a job, but as a calling," Ashraf told the crowd of mourners.

"He knew what it meant to protect the place that gave him a new beginning."

PARKCHESTER, BRONX — The sidewalk is packed with people craning their necks to catch a glimpse of the procession after Didarul Islam's funeral inside the mosque.

People are using selfie sticks to try to see over the wall of officers. Some are handing out water bottles.

Three flags are raised above the crowd: an American flag, a New York City flag and an NYPD flag. 

PARKCHESTER, BRONX — Thousands of cops from all across the nation are at Didarul Islam's funeral.

Now they are lining up outside the mosque for the body to be driven away for burial. 

He will be laid to rest in Totowa, NJ. His private internment is for family only.