The price of Whitney Houston's Ultimate Collection went up by £3 to £7.99 in the space of 30 minutes after news of the singer's death broke this weekend, it has been reported.

Digital Spy reports that Apple has been accused by some customers of "cashing in" on Houston's death.

"To say I am angry is an understatement and I feel it is just a case of iTunes cashing in on the singer's death, which in my opinion is totally parasitic," one customer is reported as saying.

However, the price of Ultimate Collection has since dropped back to £4.99 from £7.99, it would appear. Some customers are still unhappy, though.

"I can understand the marketing reasons for this but to increase the price in the first place was morally wrong... what about everyone who paid the increase in price do you plan on refunding this?" one asked.

Others, though, pointed out that the price of individual tracks had changed too. "Yesterday at noon, only I Will Always Love You was 99p. Now most of this album is priced the same for individual tracks. That's 40 pence more than they were yesterday!"

Houston was found dead in her suite at the Beverly Hilton Hotel on Saturday afternoon. She was 48.

UPDATE: According to a report in the Guardian the price rise was caused by record label Sony increasing the wholesale price of Ultimate Collection.

A Sony insider has admitted that the pricing of Houston's catalogue was reviewed after the singer's death was announced, though the price of the album was altered because it had been incorrect.