Honolulu police are investigating a bank robbery attempt in Waikiki.

Police said the suspect entered a bank, demanded money, threatened a worker and left at about 5 p.m. Friday.

Detectives did not identify the bank.

A police report said a suspect was taken into custody, but no charges have been filed.

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Police are looking for suspects in separate robbery cases in Waianae and Kalihi and arrested a woman in a Kapolei incident Friday.

Police said four suspects, a female and three males, entered a Waianae store and took items without paying at about 4:30 a.m. Friday.

One of the suspects brandished a weapon, police said.

Police did not give an exact location of the incident and did not release descriptions of the suspects.

Police are also investigating the robbery of a 74-year-old man in Kalihi.

Police said two male suspects confronted the victim and demanded property while brandishing dangerous instruments.

The suspects fled after taking the victim’s property at about 9 a.m.

Police did not give an exact location of the incident and did not release information on the suspects.

In Kapolei, police arrested a 30-year-old homeless woman on suspicion of second-degree robbery near the intersection of Kealanani and Kuloa avenues at about 6:40 p.m. Friday.

Police said the suspect used force to take property from a 19-year-old woman.