Fort Worth police said the number of alcohol-related sexual assaults in the city has suddenly increased.
Investigators passed out fliers warning women not to drink too much.
"Say no while you still can," the fliers say.
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Fort Worth police are urging women to keep their eyes on their drinks when they go out.
"It's obvious when you are impaired, it makes it easier for somebody who is looking for a victim, whether it's male or female," Sgt. Pedro Criado said.
Police said they believe the drink of a victim of a recent sexual assault may have been drugged. Police released surveillance photos Wednesday of two men wanted for questioning in the attack.
A 24-year-old woman was attacked after leaving the Neon Moon Saloon in the Stockyards area at about 3 a.m. on Feb. 1, police said.
She was seen on surveillance photos entering the bar with several friends. She and her friends got separated, and she left with two men she did not know a short time later, police said.
Police are investigating whether or not her drink was drugged.