Police in Kent were called to reports of criminal damage at a mosque in Canterbury Street, Gillingham, at 8.40pm.
A spokesman said a man is in custody on suspicion of racially-aggravated criminal damage.
More top news
One of Clandon Park's most historically important rooms has survived the fire that gutted the rest of the 18th century mansion.
The party has suspended Robert Blay. He was caught on camera saying he would shoot Ranil Jayawardena, his North East Hampshire rival.
Wednesday lunchtime's weather for the east of the region