Two children’s advocacy groups asked ‌the U.S. Federal Trade Commission on Wednesday to investigate gaming platform Roblox, according to a letter shared with Reuters saying its design features and marketing techniques are “unfair and ‌deceptive.”

The groups Fairplay and the ​National Center on Sexual Exploitation asked the FTC to investigate whether Roblox violated the ⁠Federal Trade Act’s section 5, according to ​the letter. The law prohibits unfair or deceptive practices affecting ⁠commerce.

The company is deceiving the public about the safety of its platform, the groups said in the letter. ‌They also said Roblox unfairly pressures young ​users to spend ‌money to access special in-game privileges.

The request adds to ‌intensifying scrutiny of Roblox across the world.

The company is facing more than 140 lawsuits in U.S. federal ⁠court accusing it ‌of knowingly facilitating ⁠child sexual exploitation. The lawsuits accuse Roblox of designing a ⁠platform marketed ⁠to minors that allows predators to target and contact them.

Roblox “strongly ‌disputes” the claims in the letter, a spokesperson said. Roblox requires U.S. users to complete an age check to ‌be ​able to chat ‌with other players, and minors can only chat with other users close to their ​age, according to Roblox.

An FTC spokesperson declined to comment.