A Texas plumber was stunned when he found nearly 500 envelopes full of cash inside Lakewood Church in Houston, where Joel Osteen is the pastor.

The plumber told the story Thursday when he called in to Houston radio station KILT-FM, according to the city's KPRC-TV. 

"Morning Bullpen" host George Lindsey told the TV station he was shocked by the caller's account.

"There was a loose toilet in the wall, and we removed the tile. Went to go remove the toilet and I moved some insulation away and about 500 envelopes fell out of the wall," the caller said. "I was like ‘Oh wow.’ I got my flashlight, shined up in there."

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FILE - This April 24, 2010 file photo shows Lakewood Church pastor Joel Osteen at Dodger Stadium during his "A Night of Hope" in Los Angeles. Osteen said in a statement to ABC News on Aug. 28, 2017, that his Lakewood Church would open as a shelter for Hurricane Harvey victims if needed. (AP Photo/Richard Vogel, File)

Lakewood Church pastor Joel Osteen is seen at Dodger Stadium in Los Angeles.  (Associated Press)

The envelopes were filled with cash and checks, according to the caller.

Afterward, the plumber said he reported the find to the maintenance supervisor.

"I went ahead and contacted the maintenance supervisor that was there, and I turned it all in," the caller said.

In March 2014, Lakewood Church reported that $200,000 in cash and $400,000 in checks had been stolen, in addition to some credit card information.

Vehicles queue to deliver supplies for Hurricane Harvey evacuees at the nondenominational Lakewood Church, founded by pastor Joel Osteen, in Houston, Texas, U.S. August 29, 2017. REUTERS/Ernest Scheyder - RC144976D8F0

Lakewood Church in Houston. (Reuters)

At the time, the church said the missing money had been insured. Since then, no arrests have been made in relation to the theft.

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Lakewood Church said in a statement that cash and checks were discovered recently during work being done on the church, but did not add how much money was found and did not directly confirm what the plumber said.

"Lakewood immediately notified the Houston Police Department and is assisting them with their investigation. Lakewood has no further comment at this time," the church said in a statement.

The Rev. Joel Osteen smiles at a food distribution site for Feed The Children in New York April 23, 2009. The distribution site was set up for employees laid off from hotel and restaurant jobs affected by a drop in tourism. REUTERS/Shannon Stapleton (UNITED STATES SOCIETY RELIGION BUSINESS) - RTXEB2Y

Pastor Joel Osteen. (Reuters)

Houston police said in a statement Friday that officers were dispatched to the church after the discovery was made.

Police claim that the recovered checks suggest that the money found in envelopes is related to the 2014 theft.

The Associated Press contributed to this report.