BARCELONA, Spain (AP) — Following the ramming of a small boat by an orca in the Strait of Gibraltar, authorities in Spain issued recommendations Tuesday that small vessels stick to the coastline in that region to avoid often-scary interactions with killer whales during summer months.

In the latest incident, two people aboard a 15-meter (50-foot) boat in Moroccan waters requested help from Spain’s maritime rescue service Sunday after reporting that an orca knocked the craft several times, damaging its rudder and causing a leak. The people were picked up by a passing oil tanker summoned by the rescuers, and their boat later sank.

Spain’s ministries for transport and the environment, along with its merchant marines, issued notices Tuesday urging both sailing boats and small motorboats to beware of orcas between May and August in the area between the Strait of Gibraltar and the Gulf of Cadiz.