Mexico city - Fifty grey whales have been found dead near Mexico's Baja California Peninsula - an all-time high for a migratory season, an environmental group said last week.

The Group of 100 said the cause of the deaths had not yet been determined, but it suspected environmental contamination. Homero Aridjis of the organisation said there were no reliable statistics on deaths but the total rarely reached 20.

- Sapa-AP