The 11-year-old heir to one of Germany’s oldest banking fortunes who was kidnapped and found dead in a lake was probably strangled or drowned, prosecutors said today.

AS Spaniards mourned a six-year-old girl and a 57-year-old man killed by a powerful car bomb, the Spanish government yesterday blamed the Basque separatist group ETA and promised a tough reprisal against the group and its political arm.