TAMARAC, Fla. -- For the second day in a row, authorities are searching for a bank robber marked by red dye.

According to the Broward Sheriff's Office, a man wearing a cap and sunglasses entered a Bank United, located at 5779 N. University Drive, shortly after 1 p.m. Tuesday and handed a teller a note demanding money. The incident was captured on surveillance video.

"The teller said that she saw a pistol in the man's waistband," BSO spokesman Mike Jachles said. "She complied with the note (and) gave him the money. Also, he asked for the note back. (She) gave him the note back. The man fled."

BSO detectives said as the man fled the bank with the cash, a dye pack detonated. Witnesses told the BSO the man appeared to have burned his hand before he threw the dye pack in the back of his pickup truck and drove west.

Red dye from the pack was visible on the pavement near where the robber's truck was parked.

Authorities said they believe the man might have cased the bank before the robbery. He kept his head down, seemingly knowing where the surveillance cameras were located.

The bank robbery was the second in as many days in Broward County involving a dye pack exploding.

On Monday, a man entered a Washington Mutual in Pompano Beach and demanded money from the teller, getting away with about $1,500 in cash. About an hour later, the same man entered a Cash America Pawn in Fort Lauderdale when a dye pack exploded in his pants.

BSO detectives said the dye pack was supposed to explode after the man left the bank, but a similar security system in the pawnshop likely triggered the dye pack when he entered the store.

This time, however, the dye pack did what it was supposed to do the first time.

"The dye pack was triggered immediately after the man left the bank, so it did work," Jachles said. "It did what it was supposed to do."

Detectives said red dye should be on the man's hand and in the back of his truck. The truck is an older-model white pickup with a plastic skirt on its bottom.