Three masked robbers forced their way into a home in Rowland Heights and pepper sprayed one of two brothers inside before fleeing with valuables late Friday, authorities said.

The three robbers smashed a rear sliding-glass door about 7:40 p.m. to get into the home in the 17800 block of Calle Barcelona, Los Angeles County sheriff’s Sgt. Steven Tousey said.

The home-invasion robbers encountered a 21-year-old man and his teenage brother, who were upstairs when the intruders broke in, the sergeant said.

A robber pepper-sprayed one of the brothers before the three bandits fled with cash, jewelry and an iPhone, Tousey said. No other injuries were reported.

A detailed description of the robbers was not available, Tousey said. All three wore ski-masks during the crime.

Tousey said the robbers were last seen running from the home. It was unclear if a getaway car was involved.

Anyone with information can reach the sheriff’s Walnut-Diamond Bar Station at 909-595-2264.