Two teenagers - described as part of a "crime ring" - have been arrested for theft after thousands of dollars of video games were stolen from United Video in Blenheim, police say.

United Video owner Dave Williamson said the thefts have been going on for quite a few months, despite the security cameras throughout the store.

"We kept finding broken cases all over the place," he said.

"It was a bit of a crime ring."

A 17-year-old male, unemployed, was arrested on Monday at 1.20pm and will appear in Blenheim District Court on July 23, Constable Michelle Stagg, of Blenheim, said.

A 14-year-old boy, a student, was also arrested and was referred to Youth Aid.

The games, which cost about $90 each, were stolen in the arcade area of the shop, which is usually busy during the school holidays, Mr Williamson said.

About 20 PlayStation 3 and Xbox 360 game cases have been recovered so far, he said.

Mr Williamson is keeping an eye out for more people he believes were involved in the thefts, he said.

A 37-year-old man was arrested for theft on Monday after more than $100 of fuel was stolen from Caltex, Blenheim, on April 2, police say. The man, a meatworker, was arrested about 8.55am and will appear in Blenheim District Court on July 30, Miss Stagg said.

Other arrests on Monday:

A 69-year-old man, a beneficiary, was arrested on a warrant for failing to appear;

A 15-year-old male youth, a student, was arrested for breaching his bail conditions

A 17-year-old woman, a labourer, was arrested for assault at 8.15pm after an incident at a house in Maxwell Rd, Miss Stagg said.

- The Marlborough Express